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Finding the Fourth Proportional to 372.80, 514.40 and 225.44

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Solution

The fourth proportional to 372.80, 514.40 and 225.44 is: 311.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.80 : 514.40 = 225.44 : x
  2. Step 2: Convert to fraction form
    372.80/514.40 = 225.44/x
  3. Step 3: Cross multiply
    372.80x = 514.40 × 225.44
  4. Step 4: Simplify right side
    372.80x = 115,966.34
  5. Step 5: Solve for x
    x = 115,966.34/372.80
  6. Step 6: Final answer
    x = 311.07

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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.