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Finding the Fourth Proportional to 63.27, 87.39 and 57.24

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Solution

The fourth proportional to 63.27, 87.39 and 57.24 is: 79.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.27 : 87.39 = 57.24 : x
  2. Step 2: Convert to fraction form
    63.27/87.39 = 57.24/x
  3. Step 3: Cross multiply
    63.27x = 87.39 × 57.24
  4. Step 4: Simplify right side
    63.27x = 5,002.20
  5. Step 5: Solve for x
    x = 5,002.20/63.27
  6. Step 6: Final answer
    x = 79.06

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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.