Finding the Fourth Proportional to 728,712,170.40, 1,093,068,255.60 and 658,420,240.80
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Solution
The fourth proportional to 728,712,170.40, 1,093,068,255.60 and 658,420,240.80 is: 987,630,361.20
Step by Step Solution
- Step 1: Write the proportion equation
728,712,170.40 : 1,093,068,255.60 = 658,420,240.80 : x - Step 2: Convert to fraction form
728,712,170.40/1,093,068,255.60 = 658,420,240.80/x - Step 3: Cross multiply
728,712,170.40x = 1,093,068,255.60 × 658,420,240.80 - Step 4: Simplify right side
728,712,170.40x = 719,698,264,062,987,776 - Step 5: Solve for x
x = 719,698,264,062,987,776/728,712,170.40 - Step 6: Final answer
x = 987,630,361.20
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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.