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Finding the Fourth Proportional to 487,609.80, 731,414.70 and 310,900.20

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Solution

The fourth proportional to 487,609.80, 731,414.70 and 310,900.20 is: 466,350.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,609.80 : 731,414.70 = 310,900.20 : x
  2. Step 2: Convert to fraction form
    487,609.80/731,414.70 = 310,900.20/x
  3. Step 3: Cross multiply
    487,609.80x = 731,414.70 × 310,900.20
  4. Step 4: Simplify right side
    487,609.80x = 227,396,976,512.94
  5. Step 5: Solve for x
    x = 227,396,976,512.94/487,609.80
  6. Step 6: Final answer
    x = 466,350.30

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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.