Finding the Fourth Proportional to 431,306.20, 647,153.70 and 206,579.80
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Solution
The fourth proportional to 431,306.20, 647,153.70 and 206,579.80 is: 309,962.81
Step by Step Solution
- Step 1: Write the proportion equation
431,306.20 : 647,153.70 = 206,579.80 : x - Step 2: Convert to fraction form
431,306.20/647,153.70 = 206,579.80/x - Step 3: Cross multiply
431,306.20x = 647,153.70 × 206,579.80 - Step 4: Simplify right side
431,306.20x = 133,688,881,915.26 - Step 5: Solve for x
x = 133,688,881,915.26/431,306.20 - Step 6: Final answer
x = 309,962.81
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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.