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Finding the Fourth Proportional to 242.68, 364.04 and 165.78

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Solution

The fourth proportional to 242.68, 364.04 and 165.78 is: 248.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.68 : 364.04 = 165.78 : x
  2. Step 2: Convert to fraction form
    242.68/364.04 = 165.78/x
  3. Step 3: Cross multiply
    242.68x = 364.04 × 165.78
  4. Step 4: Simplify right side
    242.68x = 60,350.55
  5. Step 5: Solve for x
    x = 60,350.55/242.68
  6. Step 6: Final answer
    x = 248.68

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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.