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Finding the Fourth Proportional to 242.58, 363.66 and 126.88

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Solution

The fourth proportional to 242.58, 363.66 and 126.88 is: 190.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.58 : 363.66 = 126.88 : x
  2. Step 2: Convert to fraction form
    242.58/363.66 = 126.88/x
  3. Step 3: Cross multiply
    242.58x = 363.66 × 126.88
  4. Step 4: Simplify right side
    242.58x = 46,141.18
  5. Step 5: Solve for x
    x = 46,141.18/242.58
  6. Step 6: Final answer
    x = 190.21

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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.