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Finding the Fourth Proportional to 251.22, 346.65 and 140.70

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Solution

The fourth proportional to 251.22, 346.65 and 140.70 is: 194.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.22 : 346.65 = 140.70 : x
  2. Step 2: Convert to fraction form
    251.22/346.65 = 140.70/x
  3. Step 3: Cross multiply
    251.22x = 346.65 × 140.70
  4. Step 4: Simplify right side
    251.22x = 48,773.66
  5. Step 5: Solve for x
    x = 48,773.66/251.22
  6. Step 6: Final answer
    x = 194.15

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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.