Home / 687,158.16-948,286.08-381,240.24

Finding the Fourth Proportional to 687,158.16, 948,286.08 and 381,240.24

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Solution

The fourth proportional to 687,158.16, 948,286.08 and 381,240.24 is: 526,115.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,158.16 : 948,286.08 = 381,240.24 : x
  2. Step 2: Convert to fraction form
    687,158.16/948,286.08 = 381,240.24/x
  3. Step 3: Cross multiply
    687,158.16x = 948,286.08 × 381,240.24
  4. Step 4: Simplify right side
    687,158.16x = 361,524,812,727.86
  5. Step 5: Solve for x
    x = 361,524,812,727.86/687,158.16
  6. Step 6: Final answer
    x = 526,115.87

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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.