Finding the Fourth Proportional to 644,532,622.80, 966,798,934.20 and 207,847,553.10
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Solution
The fourth proportional to 644,532,622.80, 966,798,934.20 and 207,847,553.10 is: 311,771,329.65
Step by Step Solution
- Step 1: Write the proportion equation
644,532,622.80 : 966,798,934.20 = 207,847,553.10 : x - Step 2: Convert to fraction form
644,532,622.80/966,798,934.20 = 207,847,553.10/x - Step 3: Cross multiply
644,532,622.80x = 966,798,934.20 × 207,847,553.10 - Step 4: Simplify right side
644,532,622.80x = 200,946,792,813,157,920 - Step 5: Solve for x
x = 200,946,792,813,157,920/644,532,622.80 - Step 6: Final answer
x = 311,771,329.65
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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.