Home / 486,972.76-672,089.15-280,236.90

Finding the Fourth Proportional to 486,972.76, 672,089.15 and 280,236.90

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Solution

The fourth proportional to 486,972.76, 672,089.15 and 280,236.90 is: 386,765.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,972.76 : 672,089.15 = 280,236.90 : x
  2. Step 2: Convert to fraction form
    486,972.76/672,089.15 = 280,236.90/x
  3. Step 3: Cross multiply
    486,972.76x = 672,089.15 × 280,236.90
  4. Step 4: Simplify right side
    486,972.76x = 188,344,179,919.64
  5. Step 5: Solve for x
    x = 188,344,179,919.64/486,972.76
  6. Step 6: Final answer
    x = 386,765.33

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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.