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Finding the Fourth Proportional to 62.89, 87.38 and 62.32

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Solution

The fourth proportional to 62.89, 87.38 and 62.32 is: 86.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.89 : 87.38 = 62.32 : x
  2. Step 2: Convert to fraction form
    62.89/87.38 = 62.32/x
  3. Step 3: Cross multiply
    62.89x = 87.38 × 62.32
  4. Step 4: Simplify right side
    62.89x = 5,445.52
  5. Step 5: Solve for x
    x = 5,445.52/62.89
  6. Step 6: Final answer
    x = 86.59

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.