Golden Mean, Golden Section, Divine Proportion are all common names for what is known as the Golden Ratio which is based off the number phi 
discovered by Italian Mathematician Fibonacco. Phi (
)is the ratio between the number sequence 
etc. where the next number in the sequence is derived by adding 
numbers together. So, 
, and 
, 
and so on. When we divide two sequential numbers i.e. 
and 
the ratio between these numbers soon become very close to
.
Some believe that it is the most efficient outcome, the result of natural forces. Whatever you believe, the pervasive appearance of φ in all we see and experience creates a sense of balance, harmony and beauty in the design of all we find in nature. It should be no surprise then that mankind would use this same proportion found in nature to achieve balance, harmony and beauty in its own creations of art, architecture, colors, design, composition, space and even music. From the partheon to Monalisa , from the Egyptian Pyramids to credit cards, has been there, always.
Now the amazing part , famous logos with golden ratios all over the place:
1. National Geographic
2. Pepsi
3. iCloud
4. BP
5. Toyota
6. Grupo Boticario
Edit 1:
Akshay Mall gave a link to an answer where the logo of Apple has been debunked. From the site where I read Apple's logo was also mentioned . I have deleted the Apple logo.
discovered by Italian Mathematician Fibonacco. Phi ()is the ratio between the number sequence etc. where the next number in the sequence is derived by adding numbers together. So, , and , and so on. When we divide two sequential numbers i.e. and the ratio between these numbers soon become very close to
.Some believe that it is the most efficient outcome, the result of natural forces. Whatever you believe, the pervasive appearance of φ in all we see and experience creates a sense of balance, harmony and beauty in the design of all we find in nature. It should be no surprise then that mankind would use this same proportion found in nature to achieve balance, harmony and beauty in its own creations of art, architecture, colors, design, composition, space and even music. From the partheon to Monalisa , from the Egyptian Pyramids to credit cards,
has been there, always.Now the amazing part , famous logos with golden ratios all over the place:
1. National Geographic
2. Pepsi
3. iCloud
4. BP
5. Toyota
6. Grupo Boticario
Edit 1:
Akshay Mall gave a link to an answer where the logo of Apple has been debunked. From the site where I read Apple's logo was also mentioned . I have deleted the Apple logo.