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Finding the Fourth Proportional to 398.38, 549.52 and 250.90

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Solution

The fourth proportional to 398.38, 549.52 and 250.90 is: 346.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.38 : 549.52 = 250.90 : x
  2. Step 2: Convert to fraction form
    398.38/549.52 = 250.90/x
  3. Step 3: Cross multiply
    398.38x = 549.52 × 250.90
  4. Step 4: Simplify right side
    398.38x = 137,874.57
  5. Step 5: Solve for x
    x = 137,874.57/398.38
  6. Step 6: Final answer
    x = 346.09

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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.