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Finding the Fourth Proportional to 249.70, 373.85 and 172.24

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Solution

The fourth proportional to 249.70, 373.85 and 172.24 is: 257.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.70 : 373.85 = 172.24 : x
  2. Step 2: Convert to fraction form
    249.70/373.85 = 172.24/x
  3. Step 3: Cross multiply
    249.70x = 373.85 × 172.24
  4. Step 4: Simplify right side
    249.70x = 64,391.42
  5. Step 5: Solve for x
    x = 64,391.42/249.70
  6. Step 6: Final answer
    x = 257.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.