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Finding the Fourth Proportional to 687,337.17, 948,500.45 and 381,426.90

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Solution

The fourth proportional to 687,337.17, 948,500.45 and 381,426.90 is: 526,355.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,337.17 : 948,500.45 = 381,426.90 : x
  2. Step 2: Convert to fraction form
    687,337.17/948,500.45 = 381,426.90/x
  3. Step 3: Cross multiply
    687,337.17x = 948,500.45 × 381,426.90
  4. Step 4: Simplify right side
    687,337.17x = 361,783,582,258.45
  5. Step 5: Solve for x
    x = 361,783,582,258.45/687,337.17
  6. Step 6: Final answer
    x = 526,355.33

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.