Finding the Fourth Proportional to 728,712,136.90, 1,093,068,205.35 and 658,420,207.30
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Solution
The fourth proportional to 728,712,136.90, 1,093,068,205.35 and 658,420,207.30 is: 987,630,310.95
Step by Step Solution
- Step 1: Write the proportion equation
728,712,136.90 : 1,093,068,205.35 = 658,420,207.30 : x - Step 2: Convert to fraction form
728,712,136.90/1,093,068,205.35 = 658,420,207.30/x - Step 3: Cross multiply
728,712,136.90x = 1,093,068,205.35 × 658,420,207.30 - Step 4: Simplify right side
728,712,136.90x = 719,698,194,359,585,792 - Step 5: Solve for x
x = 719,698,194,359,585,792/728,712,136.90 - Step 6: Final answer
x = 987,630,310.95
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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.