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Finding the Fourth Proportional to 721,514.71, 995,532.28 and 431,082.70

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Solution

The fourth proportional to 721,514.71, 995,532.28 and 431,082.70 is: 594,799.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,514.71 : 995,532.28 = 431,082.70 : x
  2. Step 2: Convert to fraction form
    721,514.71/995,532.28 = 431,082.70/x
  3. Step 3: Cross multiply
    721,514.71x = 995,532.28 × 431,082.70
  4. Step 4: Simplify right side
    721,514.71x = 429,156,743,199.56
  5. Step 5: Solve for x
    x = 429,156,743,199.56/721,514.71
  6. Step 6: Final answer
    x = 594,799.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.