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Finding the Fourth Proportional to 42.53, 58.73 and 39.08

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Solution

The fourth proportional to 42.53, 58.73 and 39.08 is: 53.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.53 : 58.73 = 39.08 : x
  2. Step 2: Convert to fraction form
    42.53/58.73 = 39.08/x
  3. Step 3: Cross multiply
    42.53x = 58.73 × 39.08
  4. Step 4: Simplify right side
    42.53x = 2,295.12
  5. Step 5: Solve for x
    x = 2,295.12/42.53
  6. Step 6: Final answer
    x = 53.97

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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.