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Finding the Fourth Proportional to 42.25, 58.32 and 29.35

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Solution

The fourth proportional to 42.25, 58.32 and 29.35 is: 40.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.25 : 58.32 = 29.35 : x
  2. Step 2: Convert to fraction form
    42.25/58.32 = 29.35/x
  3. Step 3: Cross multiply
    42.25x = 58.32 × 29.35
  4. Step 4: Simplify right side
    42.25x = 1,711.69
  5. Step 5: Solve for x
    x = 1,711.69/42.25
  6. Step 6: Final answer
    x = 40.51

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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.