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Finding the Fourth Proportional to 39.17, 58.28 and 38.24

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Solution

The fourth proportional to 39.17, 58.28 and 38.24 is: 56.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.17 : 58.28 = 38.24 : x
  2. Step 2: Convert to fraction form
    39.17/58.28 = 38.24/x
  3. Step 3: Cross multiply
    39.17x = 58.28 × 38.24
  4. Step 4: Simplify right side
    39.17x = 2,228.63
  5. Step 5: Solve for x
    x = 2,228.63/39.17
  6. Step 6: Final answer
    x = 56.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.