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Finding the Fourth Proportional to 43.97, 65.52 and 42.89

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Solution

The fourth proportional to 43.97, 65.52 and 42.89 is: 63.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.97 : 65.52 = 42.89 : x
  2. Step 2: Convert to fraction form
    43.97/65.52 = 42.89/x
  3. Step 3: Cross multiply
    43.97x = 65.52 × 42.89
  4. Step 4: Simplify right side
    43.97x = 2,809.83
  5. Step 5: Solve for x
    x = 2,809.83/43.97
  6. Step 6: Final answer
    x = 63.91

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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.