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Finding the Fourth Proportional to 372.78, 514.65 and 248.66

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Solution

The fourth proportional to 372.78, 514.65 and 248.66 is: 343.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.78 : 514.65 = 248.66 : x
  2. Step 2: Convert to fraction form
    372.78/514.65 = 248.66/x
  3. Step 3: Cross multiply
    372.78x = 514.65 × 248.66
  4. Step 4: Simplify right side
    372.78x = 127,970.30
  5. Step 5: Solve for x
    x = 127,970.30/372.78
  6. Step 6: Final answer
    x = 343.29

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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.