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Finding the Fourth Proportional to 242.31, 360.78 and 238.92

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Solution

The fourth proportional to 242.31, 360.78 and 238.92 is: 355.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.31 : 360.78 = 238.92 : x
  2. Step 2: Convert to fraction form
    242.31/360.78 = 238.92/x
  3. Step 3: Cross multiply
    242.31x = 360.78 × 238.92
  4. Step 4: Simplify right side
    242.31x = 86,197.56
  5. Step 5: Solve for x
    x = 86,197.56/242.31
  6. Step 6: Final answer
    x = 355.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.