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Finding the Fourth Proportional to 372.78, 514.67 and 240.05

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Solution

The fourth proportional to 372.78, 514.67 and 240.05 is: 331.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.78 : 514.67 = 240.05 : x
  2. Step 2: Convert to fraction form
    372.78/514.67 = 240.05/x
  3. Step 3: Cross multiply
    372.78x = 514.67 × 240.05
  4. Step 4: Simplify right side
    372.78x = 123,546.04
  5. Step 5: Solve for x
    x = 123,546.04/372.78
  6. Step 6: Final answer
    x = 331.42

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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.