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Finding the Fourth Proportional to 250.49, 372.90 and 238.70

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Solution

The fourth proportional to 250.49, 372.90 and 238.70 is: 355.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.49 : 372.90 = 238.70 : x
  2. Step 2: Convert to fraction form
    250.49/372.90 = 238.70/x
  3. Step 3: Cross multiply
    250.49x = 372.90 × 238.70
  4. Step 4: Simplify right side
    250.49x = 89,010.04
  5. Step 5: Solve for x
    x = 89,010.04/250.49
  6. Step 6: Final answer
    x = 355.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.