Home / 1,231.38-1,847.33-387.17

Finding the Fourth Proportional to 1,231.38, 1,847.33 and 387.17

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Solution

The fourth proportional to 1,231.38, 1,847.33 and 387.17 is: 580.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.38 : 1,847.33 = 387.17 : x
  2. Step 2: Convert to fraction form
    1,231.38/1,847.33 = 387.17/x
  3. Step 3: Cross multiply
    1,231.38x = 1,847.33 × 387.17
  4. Step 4: Simplify right side
    1,231.38x = 715,226.45
  5. Step 5: Solve for x
    x = 715,226.45/1,231.38
  6. Step 6: Final answer
    x = 580.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.