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Finding the Fourth Proportional to 239.39, 330.17 and 156.52

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Solution

The fourth proportional to 239.39, 330.17 and 156.52 is: 215.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.39 : 330.17 = 156.52 : x
  2. Step 2: Convert to fraction form
    239.39/330.17 = 156.52/x
  3. Step 3: Cross multiply
    239.39x = 330.17 × 156.52
  4. Step 4: Simplify right side
    239.39x = 51,678.21
  5. Step 5: Solve for x
    x = 51,678.21/239.39
  6. Step 6: Final answer
    x = 215.87

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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.