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Finding the Fourth Proportional to 44.02, 66.12 and 38.80

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Solution

The fourth proportional to 44.02, 66.12 and 38.80 is: 58.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.02 : 66.12 = 38.80 : x
  2. Step 2: Convert to fraction form
    44.02/66.12 = 38.80/x
  3. Step 3: Cross multiply
    44.02x = 66.12 × 38.80
  4. Step 4: Simplify right side
    44.02x = 2,565.46
  5. Step 5: Solve for x
    x = 2,565.46/44.02
  6. Step 6: Final answer
    x = 58.28

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Why These Related Problems?

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