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Finding the Fourth Proportional to 400.23, 552.21 and 225.57

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Solution

The fourth proportional to 400.23, 552.21 and 225.57 is: 311.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.23 : 552.21 = 225.57 : x
  2. Step 2: Convert to fraction form
    400.23/552.21 = 225.57/x
  3. Step 3: Cross multiply
    400.23x = 552.21 × 225.57
  4. Step 4: Simplify right side
    400.23x = 124,562.01
  5. Step 5: Solve for x
    x = 124,562.01/400.23
  6. Step 6: Final answer
    x = 311.23

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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.