Home / 687,249.32-948,456.18-381,383.73

Finding the Fourth Proportional to 687,249.32, 948,456.18 and 381,383.73

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Solution

The fourth proportional to 687,249.32, 948,456.18 and 381,383.73 is: 526,338.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,249.32 : 948,456.18 = 381,383.73 : x
  2. Step 2: Convert to fraction form
    687,249.32/948,456.18 = 381,383.73/x
  3. Step 3: Cross multiply
    687,249.32x = 948,456.18 × 381,383.73
  4. Step 4: Simplify right side
    687,249.32x = 361,725,755,669.95
  5. Step 5: Solve for x
    x = 361,725,755,669.95/687,249.32
  6. Step 6: Final answer
    x = 526,338.47

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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.