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Finding the Fourth Proportional to 250.74, 345.62 and 198.20

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Solution

The fourth proportional to 250.74, 345.62 and 198.20 is: 273.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.74 : 345.62 = 198.20 : x
  2. Step 2: Convert to fraction form
    250.74/345.62 = 198.20/x
  3. Step 3: Cross multiply
    250.74x = 345.62 × 198.20
  4. Step 4: Simplify right side
    250.74x = 68,499.91
  5. Step 5: Solve for x
    x = 68,499.91/250.74
  6. Step 6: Final answer
    x = 273.19

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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.