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Finding the Fourth Proportional to 239.01, 358.40 and 76.61

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Solution

The fourth proportional to 239.01, 358.40 and 76.61 is: 114.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.01 : 358.40 = 76.61 : x
  2. Step 2: Convert to fraction form
    239.01/358.40 = 76.61/x
  3. Step 3: Cross multiply
    239.01x = 358.40 × 76.61
  4. Step 4: Simplify right side
    239.01x = 27,454.85
  5. Step 5: Solve for x
    x = 27,454.85/239.01
  6. Step 6: Final answer
    x = 114.87

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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.