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Finding the Fourth Proportional to 242.76, 364.11 and 105.78

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Solution

The fourth proportional to 242.76, 364.11 and 105.78 is: 158.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.76 : 364.11 = 105.78 : x
  2. Step 2: Convert to fraction form
    242.76/364.11 = 105.78/x
  3. Step 3: Cross multiply
    242.76x = 364.11 × 105.78
  4. Step 4: Simplify right side
    242.76x = 38,515.56
  5. Step 5: Solve for x
    x = 38,515.56/242.76
  6. Step 6: Final answer
    x = 158.66

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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.