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Finding the Fourth Proportional to 240.71, 332.19 and 142.43

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Solution

The fourth proportional to 240.71, 332.19 and 142.43 is: 196.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.71 : 332.19 = 142.43 : x
  2. Step 2: Convert to fraction form
    240.71/332.19 = 142.43/x
  3. Step 3: Cross multiply
    240.71x = 332.19 × 142.43
  4. Step 4: Simplify right side
    240.71x = 47,312.16
  5. Step 5: Solve for x
    x = 47,312.16/240.71
  6. Step 6: Final answer
    x = 196.56

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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.