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Finding the Fourth Proportional to 242.72, 334.64 and 159.85

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Solution

The fourth proportional to 242.72, 334.64 and 159.85 is: 220.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.72 : 334.64 = 159.85 : x
  2. Step 2: Convert to fraction form
    242.72/334.64 = 159.85/x
  3. Step 3: Cross multiply
    242.72x = 334.64 × 159.85
  4. Step 4: Simplify right side
    242.72x = 53,493.02
  5. Step 5: Solve for x
    x = 53,493.02/242.72
  6. Step 6: Final answer
    x = 220.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.