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Finding the Fourth Proportional to 43.24, 64.86 and 38.12

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Solution

The fourth proportional to 43.24, 64.86 and 38.12 is: 57.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.24 : 64.86 = 38.12 : x
  2. Step 2: Convert to fraction form
    43.24/64.86 = 38.12/x
  3. Step 3: Cross multiply
    43.24x = 64.86 × 38.12
  4. Step 4: Simplify right side
    43.24x = 2,472.46
  5. Step 5: Solve for x
    x = 2,472.46/43.24
  6. Step 6: Final answer
    x = 57.18

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.