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Finding the Fourth Proportional to 42.39, 58.40 and 35.04

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Solution

The fourth proportional to 42.39, 58.40 and 35.04 is: 48.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.39 : 58.40 = 35.04 : x
  2. Step 2: Convert to fraction form
    42.39/58.40 = 35.04/x
  3. Step 3: Cross multiply
    42.39x = 58.40 × 35.04
  4. Step 4: Simplify right side
    42.39x = 2,046.20
  5. Step 5: Solve for x
    x = 2,046.20/42.39
  6. Step 6: Final answer
    x = 48.28

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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.