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Finding the Fourth Proportional to 372.88, 514.61 and 225.55

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Solution

The fourth proportional to 372.88, 514.61 and 225.55 is: 311.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.88 : 514.61 = 225.55 : x
  2. Step 2: Convert to fraction form
    372.88/514.61 = 225.55/x
  3. Step 3: Cross multiply
    372.88x = 514.61 × 225.55
  4. Step 4: Simplify right side
    372.88x = 116,070.29
  5. Step 5: Solve for x
    x = 116,070.29/372.88
  6. Step 6: Final answer
    x = 311.28

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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.