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Finding the Fourth Proportional to 251.38, 345.67 and 243.70

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Solution

The fourth proportional to 251.38, 345.67 and 243.70 is: 335.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.38 : 345.67 = 243.70 : x
  2. Step 2: Convert to fraction form
    251.38/345.67 = 243.70/x
  3. Step 3: Cross multiply
    251.38x = 345.67 × 243.70
  4. Step 4: Simplify right side
    251.38x = 84,239.78
  5. Step 5: Solve for x
    x = 84,239.78/251.38
  6. Step 6: Final answer
    x = 335.11

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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.