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Finding the Fourth Proportional to 250.43, 345.20 and 197.90

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Solution

The fourth proportional to 250.43, 345.20 and 197.90 is: 272.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.43 : 345.20 = 197.90 : x
  2. Step 2: Convert to fraction form
    250.43/345.20 = 197.90/x
  3. Step 3: Cross multiply
    250.43x = 345.20 × 197.90
  4. Step 4: Simplify right side
    250.43x = 68,312.36
  5. Step 5: Solve for x
    x = 68,312.36/250.43
  6. Step 6: Final answer
    x = 272.79

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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.