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Finding the Fourth Proportional to 423,938.96, 635,317.76 and 318,635.12

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Solution

The fourth proportional to 423,938.96, 635,317.76 and 318,635.12 is: 477,508.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,938.96 : 635,317.76 = 318,635.12 : x
  2. Step 2: Convert to fraction form
    423,938.96/635,317.76 = 318,635.12/x
  3. Step 3: Cross multiply
    423,938.96x = 635,317.76 × 318,635.12
  4. Step 4: Simplify right side
    423,938.96x = 202,434,550,695.73
  5. Step 5: Solve for x
    x = 202,434,550,695.73/423,938.96
  6. Step 6: Final answer
    x = 477,508.72

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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.