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Finding the Fourth Proportional to 251.39, 345.68 and 243.70

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Solution

The fourth proportional to 251.39, 345.68 and 243.70 is: 335.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.39 : 345.68 = 243.70 : x
  2. Step 2: Convert to fraction form
    251.39/345.68 = 243.70/x
  3. Step 3: Cross multiply
    251.39x = 345.68 × 243.70
  4. Step 4: Simplify right side
    251.39x = 84,242.22
  5. Step 5: Solve for x
    x = 84,242.22/251.39
  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.