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Finding the Fourth Proportional to 400.20, 552.30 and 225.57

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Solution

The fourth proportional to 400.20, 552.30 and 225.57 is: 311.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.20 : 552.30 = 225.57 : x
  2. Step 2: Convert to fraction form
    400.20/552.30 = 225.57/x
  3. Step 3: Cross multiply
    400.20x = 552.30 × 225.57
  4. Step 4: Simplify right side
    400.20x = 124,582.31
  5. Step 5: Solve for x
    x = 124,582.31/400.20
  6. Step 6: Final answer
    x = 311.30

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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.