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Finding the Fourth Proportional to 62.31, 85.97 and 42.65

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Solution

The fourth proportional to 62.31, 85.97 and 42.65 is: 58.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.31 : 85.97 = 42.65 : x
  2. Step 2: Convert to fraction form
    62.31/85.97 = 42.65/x
  3. Step 3: Cross multiply
    62.31x = 85.97 × 42.65
  4. Step 4: Simplify right side
    62.31x = 3,666.62
  5. Step 5: Solve for x
    x = 3,666.62/62.31
  6. Step 6: Final answer
    x = 58.85

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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.