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Finding the Fourth Proportional to 380.90, 525.48 and 249.74

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Solution

The fourth proportional to 380.90, 525.48 and 249.74 is: 344.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.90 : 525.48 = 249.74 : x
  2. Step 2: Convert to fraction form
    380.90/525.48 = 249.74/x
  3. Step 3: Cross multiply
    380.90x = 525.48 × 249.74
  4. Step 4: Simplify right side
    380.90x = 131,233.38
  5. Step 5: Solve for x
    x = 131,233.38/380.90
  6. Step 6: Final answer
    x = 344.53

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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.