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Finding the Fourth Proportional to 687,294.38, 948,471.30 and 381,371.96

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Solution

The fourth proportional to 687,294.38, 948,471.30 and 381,371.96 is: 526,296.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,294.38 : 948,471.30 = 381,371.96 : x
  2. Step 2: Convert to fraction form
    687,294.38/948,471.30 = 381,371.96/x
  3. Step 3: Cross multiply
    687,294.38x = 948,471.30 × 381,371.96
  4. Step 4: Simplify right side
    687,294.38x = 361,720,358,684.75
  5. Step 5: Solve for x
    x = 361,720,358,684.75/687,294.38
  6. Step 6: Final answer
    x = 526,296.11

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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.