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Finding the Fourth Proportional to 242.21, 363.32 and 79.92

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Solution

The fourth proportional to 242.21, 363.32 and 79.92 is: 119.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.21 : 363.32 = 79.92 : x
  2. Step 2: Convert to fraction form
    242.21/363.32 = 79.92/x
  3. Step 3: Cross multiply
    242.21x = 363.32 × 79.92
  4. Step 4: Simplify right side
    242.21x = 29,036.53
  5. Step 5: Solve for x
    x = 29,036.53/242.21
  6. Step 6: Final answer
    x = 119.88

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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.