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Finding the Fourth Proportional to 291.97, 437.91 and 75.54

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Solution

The fourth proportional to 291.97, 437.91 and 75.54 is: 113.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.97 : 437.91 = 75.54 : x
  2. Step 2: Convert to fraction form
    291.97/437.91 = 75.54/x
  3. Step 3: Cross multiply
    291.97x = 437.91 × 75.54
  4. Step 4: Simplify right side
    291.97x = 33,079.72
  5. Step 5: Solve for x
    x = 33,079.72/291.97
  6. Step 6: Final answer
    x = 113.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.