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Finding the Fourth Proportional to 240.78, 332.18 and 239.70

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Solution

The fourth proportional to 240.78, 332.18 and 239.70 is: 330.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.78 : 332.18 = 239.70 : x
  2. Step 2: Convert to fraction form
    240.78/332.18 = 239.70/x
  3. Step 3: Cross multiply
    240.78x = 332.18 × 239.70
  4. Step 4: Simplify right side
    240.78x = 79,623.55
  5. Step 5: Solve for x
    x = 79,623.55/240.78
  6. Step 6: Final answer
    x = 330.69

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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.