Finding the Fourth Proportional to 427,310,000.20, 640,965,000.30 and 398,644,553.80
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Solution
The fourth proportional to 427,310,000.20, 640,965,000.30 and 398,644,553.80 is: 597,966,830.70
Step by Step Solution
- Step 1: Write the proportion equation
427,310,000.20 : 640,965,000.30 = 398,644,553.80 : x - Step 2: Convert to fraction form
427,310,000.20/640,965,000.30 = 398,644,553.80/x - Step 3: Cross multiply
427,310,000.20x = 640,965,000.30 × 398,644,553.80 - Step 4: Simplify right side
427,310,000.20x = 255,517,206,546,010,368 - Step 5: Solve for x
x = 255,517,206,546,010,368/427,310,000.20 - Step 6: Final answer
x = 597,966,830.70
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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.