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Finding the Fourth Proportional to 43.29, 64.68 and 38.09

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Solution

The fourth proportional to 43.29, 64.68 and 38.09 is: 56.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.29 : 64.68 = 38.09 : x
  2. Step 2: Convert to fraction form
    43.29/64.68 = 38.09/x
  3. Step 3: Cross multiply
    43.29x = 64.68 × 38.09
  4. Step 4: Simplify right side
    43.29x = 2,463.68
  5. Step 5: Solve for x
    x = 2,463.68/43.29
  6. Step 6: Final answer
    x = 56.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.