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Finding the Fourth Proportional to 42.39, 63.30 and 37.83

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Solution

The fourth proportional to 42.39, 63.30 and 37.83 is: 56.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.39 : 63.30 = 37.83 : x
  2. Step 2: Convert to fraction form
    42.39/63.30 = 37.83/x
  3. Step 3: Cross multiply
    42.39x = 63.30 × 37.83
  4. Step 4: Simplify right side
    42.39x = 2,394.64
  5. Step 5: Solve for x
    x = 2,394.64/42.39
  6. Step 6: Final answer
    x = 56.49

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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.