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Finding the Fourth Proportional to 372.76, 514.20 and 256.48

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Solution

The fourth proportional to 372.76, 514.20 and 256.48 is: 353.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.76 : 514.20 = 256.48 : x
  2. Step 2: Convert to fraction form
    372.76/514.20 = 256.48/x
  3. Step 3: Cross multiply
    372.76x = 514.20 × 256.48
  4. Step 4: Simplify right side
    372.76x = 131,882.02
  5. Step 5: Solve for x
    x = 131,882.02/372.76
  6. Step 6: Final answer
    x = 353.80

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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.