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Finding the Fourth Proportional to 242.96, 335.52 and 155.79

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Solution

The fourth proportional to 242.96, 335.52 and 155.79 is: 215.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.96 : 335.52 = 155.79 : x
  2. Step 2: Convert to fraction form
    242.96/335.52 = 155.79/x
  3. Step 3: Cross multiply
    242.96x = 335.52 × 155.79
  4. Step 4: Simplify right side
    242.96x = 52,269.43
  5. Step 5: Solve for x
    x = 52,269.43/242.96
  6. Step 6: Final answer
    x = 215.13

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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.