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Finding the Fourth Proportional to 57.98, 80.04 and 38.31

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Solution

The fourth proportional to 57.98, 80.04 and 38.31 is: 52.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.98 : 80.04 = 38.31 : x
  2. Step 2: Convert to fraction form
    57.98/80.04 = 38.31/x
  3. Step 3: Cross multiply
    57.98x = 80.04 × 38.31
  4. Step 4: Simplify right side
    57.98x = 3,066.33
  5. Step 5: Solve for x
    x = 3,066.33/57.98
  6. Step 6: Final answer
    x = 52.89

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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.