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Finding the Fourth Proportional to 250.72, 345.96 and 140.20

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Solution

The fourth proportional to 250.72, 345.96 and 140.20 is: 193.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.72 : 345.96 = 140.20 : x
  2. Step 2: Convert to fraction form
    250.72/345.96 = 140.20/x
  3. Step 3: Cross multiply
    250.72x = 345.96 × 140.20
  4. Step 4: Simplify right side
    250.72x = 48,502.73
  5. Step 5: Solve for x
    x = 48,502.73/250.72
  6. Step 6: Final answer
    x = 193.46

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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.