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Finding the Fourth Proportional to 242.62, 334.90 and 155.54

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Solution

The fourth proportional to 242.62, 334.90 and 155.54 is: 214.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.62 : 334.90 = 155.54 : x
  2. Step 2: Convert to fraction form
    242.62/334.90 = 155.54/x
  3. Step 3: Cross multiply
    242.62x = 334.90 × 155.54
  4. Step 4: Simplify right side
    242.62x = 52,091.38
  5. Step 5: Solve for x
    x = 52,091.38/242.62
  6. Step 6: Final answer
    x = 214.71

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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.