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Finding the Fourth Proportional to 59.38, 81.88 and 38.67

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Solution

The fourth proportional to 59.38, 81.88 and 38.67 is: 53.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.38 : 81.88 = 38.67 : x
  2. Step 2: Convert to fraction form
    59.38/81.88 = 38.67/x
  3. Step 3: Cross multiply
    59.38x = 81.88 × 38.67
  4. Step 4: Simplify right side
    59.38x = 3,166.11
  5. Step 5: Solve for x
    x = 3,166.11/59.38
  6. Step 6: Final answer
    x = 53.32

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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.