Finding the Fourth Proportional to 431,446.20, 647,363.70 and 206,719.80
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Solution
The fourth proportional to 431,446.20, 647,363.70 and 206,719.80 is: 310,172.84
Step by Step Solution
- Step 1: Write the proportion equation
431,446.20 : 647,363.70 = 206,719.80 : x - Step 2: Convert to fraction form
431,446.20/647,363.70 = 206,719.80/x - Step 3: Cross multiply
431,446.20x = 647,363.70 × 206,719.80 - Step 4: Simplify right side
431,446.20x = 133,822,894,591.26 - Step 5: Solve for x
x = 133,822,894,591.26/431,446.20 - Step 6: Final answer
x = 310,172.84
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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.