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Finding the Fourth Proportional to 58.42, 87.54 and 31.27

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Solution

The fourth proportional to 58.42, 87.54 and 31.27 is: 46.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.42 : 87.54 = 31.27 : x
  2. Step 2: Convert to fraction form
    58.42/87.54 = 31.27/x
  3. Step 3: Cross multiply
    58.42x = 87.54 × 31.27
  4. Step 4: Simplify right side
    58.42x = 2,737.38
  5. Step 5: Solve for x
    x = 2,737.38/58.42
  6. Step 6: Final answer
    x = 46.86

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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.