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Finding the Fourth Proportional to 400.19, 552.28 and 225.55

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Solution

The fourth proportional to 400.19, 552.28 and 225.55 is: 311.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.19 : 552.28 = 225.55 : x
  2. Step 2: Convert to fraction form
    400.19/552.28 = 225.55/x
  3. Step 3: Cross multiply
    400.19x = 552.28 × 225.55
  4. Step 4: Simplify right side
    400.19x = 124,566.75
  5. Step 5: Solve for x
    x = 124,566.75/400.19
  6. Step 6: Final answer
    x = 311.27

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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.