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Finding the Fourth Proportional to 943.27, 1,414.91 and 387.83

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Solution

The fourth proportional to 943.27, 1,414.91 and 387.83 is: 581.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.27 : 1,414.91 = 387.83 : x
  2. Step 2: Convert to fraction form
    943.27/1,414.91 = 387.83/x
  3. Step 3: Cross multiply
    943.27x = 1,414.91 × 387.83
  4. Step 4: Simplify right side
    943.27x = 548,742.61
  5. Step 5: Solve for x
    x = 548,742.61/943.27
  6. Step 6: Final answer
    x = 581.75

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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.