Finding the Fourth Proportional to 915,129,725.36, 1,245,984,051.76 and 912,224,071.76
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Solution
The fourth proportional to 915,129,725.36, 1,245,984,051.76 and 912,224,071.76 is: 1,242,027,893.47
Step by Step Solution
- Step 1: Write the proportion equation
915,129,725.36 : 1,245,984,051.76 = 912,224,071.76 : x - Step 2: Convert to fraction form
915,129,725.36/1,245,984,051.76 = 912,224,071.76/x - Step 3: Cross multiply
915,129,725.36x = 1,245,984,051.76 × 912,224,071.76 - Step 4: Simplify right side
915,129,725.36x = 1,136,616,645,044,529,792 - Step 5: Solve for x
x = 1,136,616,645,044,529,792/915,129,725.36 - Step 6: Final answer
x = 1,242,027,893.47
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Double scale
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.