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Finding the Fourth Proportional to 494.74, 742.80 and 251.44

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Solution

The fourth proportional to 494.74, 742.80 and 251.44 is: 377.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.74 : 742.80 = 251.44 : x
  2. Step 2: Convert to fraction form
    494.74/742.80 = 251.44/x
  3. Step 3: Cross multiply
    494.74x = 742.80 × 251.44
  4. Step 4: Simplify right side
    494.74x = 186,769.63
  5. Step 5: Solve for x
    x = 186,769.63/494.74
  6. Step 6: Final answer
    x = 377.51

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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.