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Finding the Fourth Proportional to 251.23, 346.70 and 140.71

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Solution

The fourth proportional to 251.23, 346.70 and 140.71 is: 194.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.23 : 346.70 = 140.71 : x
  2. Step 2: Convert to fraction form
    251.23/346.70 = 140.71/x
  3. Step 3: Cross multiply
    251.23x = 346.70 × 140.71
  4. Step 4: Simplify right side
    251.23x = 48,781.72
  5. Step 5: Solve for x
    x = 48,781.72/251.23
  6. Step 6: Final answer
    x = 194.18

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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.