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Finding the Fourth Proportional to 372.74, 514.78 and 248.92

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Solution

The fourth proportional to 372.74, 514.78 and 248.92 is: 343.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.74 : 514.78 = 248.92 : x
  2. Step 2: Convert to fraction form
    372.74/514.78 = 248.92/x
  3. Step 3: Cross multiply
    372.74x = 514.78 × 248.92
  4. Step 4: Simplify right side
    372.74x = 128,137.13
  5. Step 5: Solve for x
    x = 128,137.13/372.74
  6. Step 6: Final answer
    x = 343.78

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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.