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Finding the Fourth Proportional to 39.31, 58.60 and 38.93

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Solution

The fourth proportional to 39.31, 58.60 and 38.93 is: 58.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.31 : 58.60 = 38.93 : x
  2. Step 2: Convert to fraction form
    39.31/58.60 = 38.93/x
  3. Step 3: Cross multiply
    39.31x = 58.60 × 38.93
  4. Step 4: Simplify right side
    39.31x = 2,281.30
  5. Step 5: Solve for x
    x = 2,281.30/39.31
  6. Step 6: Final answer
    x = 58.03

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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.