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Finding the Fourth Proportional to 62.92, 86.82 and 39.62

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Solution

The fourth proportional to 62.92, 86.82 and 39.62 is: 54.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.92 : 86.82 = 39.62 : x
  2. Step 2: Convert to fraction form
    62.92/86.82 = 39.62/x
  3. Step 3: Cross multiply
    62.92x = 86.82 × 39.62
  4. Step 4: Simplify right side
    62.92x = 3,439.81
  5. Step 5: Solve for x
    x = 3,439.81/62.92
  6. Step 6: Final answer
    x = 54.67

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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.