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Finding the Fourth Proportional to 242.70, 335.02 and 159.78

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Solution

The fourth proportional to 242.70, 335.02 and 159.78 is: 220.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.70 : 335.02 = 159.78 : x
  2. Step 2: Convert to fraction form
    242.70/335.02 = 159.78/x
  3. Step 3: Cross multiply
    242.70x = 335.02 × 159.78
  4. Step 4: Simplify right side
    242.70x = 53,529.50
  5. Step 5: Solve for x
    x = 53,529.50/242.70
  6. Step 6: Final answer
    x = 220.56

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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.