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Finding the Fourth Proportional to 397.28, 548.50 and 250.13

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Solution

The fourth proportional to 397.28, 548.50 and 250.13 is: 345.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.28 : 548.50 = 250.13 : x
  2. Step 2: Convert to fraction form
    397.28/548.50 = 250.13/x
  3. Step 3: Cross multiply
    397.28x = 548.50 × 250.13
  4. Step 4: Simplify right side
    397.28x = 137,197.05
  5. Step 5: Solve for x
    x = 137,197.05/397.28
  6. Step 6: Final answer
    x = 345.34

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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.