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Finding the Fourth Proportional to 242.70, 334.92 and 159.94

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Solution

The fourth proportional to 242.70, 334.92 and 159.94 is: 220.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.70 : 334.92 = 159.94 : x
  2. Step 2: Convert to fraction form
    242.70/334.92 = 159.94/x
  3. Step 3: Cross multiply
    242.70x = 334.92 × 159.94
  4. Step 4: Simplify right side
    242.70x = 53,567.10
  5. Step 5: Solve for x
    x = 53,567.10/242.70
  6. Step 6: Final answer
    x = 220.71

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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.