Finding the Fourth Proportional to 639,738,048.80, 959,607,073.20 and 536,425,918.40
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Solution
The fourth proportional to 639,738,048.80, 959,607,073.20 and 536,425,918.40 is: 804,638,877.60
Step by Step Solution
- Step 1: Write the proportion equation
639,738,048.80 : 959,607,073.20 = 536,425,918.40 : x - Step 2: Convert to fraction form
639,738,048.80/959,607,073.20 = 536,425,918.40/x - Step 3: Cross multiply
639,738,048.80x = 959,607,073.20 × 536,425,918.40 - Step 4: Simplify right side
639,738,048.80x = 514,758,105,544,446,016 - Step 5: Solve for x
x = 514,758,105,544,446,016/639,738,048.80 - Step 6: Final answer
x = 804,638,877.60
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.