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Finding the Fourth Proportional to 687,337.92, 948,501.48 and 381,427.65

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Solution

The fourth proportional to 687,337.92, 948,501.48 and 381,427.65 is: 526,356.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,337.92 : 948,501.48 = 381,427.65 : x
  2. Step 2: Convert to fraction form
    687,337.92/948,501.48 = 381,427.65/x
  3. Step 3: Cross multiply
    687,337.92x = 948,501.48 × 381,427.65
  4. Step 4: Simplify right side
    687,337.92x = 361,784,690,537.92
  5. Step 5: Solve for x
    x = 361,784,690,537.92/687,337.92
  6. Step 6: Final answer
    x = 526,356.37

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Double scale
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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.