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Finding the Fourth Proportional to 242.68, 363.78 and 105.64

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Solution

The fourth proportional to 242.68, 363.78 and 105.64 is: 158.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.68 : 363.78 = 105.64 : x
  2. Step 2: Convert to fraction form
    242.68/363.78 = 105.64/x
  3. Step 3: Cross multiply
    242.68x = 363.78 × 105.64
  4. Step 4: Simplify right side
    242.68x = 38,429.72
  5. Step 5: Solve for x
    x = 38,429.72/242.68
  6. Step 6: Final answer
    x = 158.36

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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.