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Finding the Fourth Proportional to 225.18, 339.46 and 209.52

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Solution

The fourth proportional to 225.18, 339.46 and 209.52 is: 315.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.18 : 339.46 = 209.52 : x
  2. Step 2: Convert to fraction form
    225.18/339.46 = 209.52/x
  3. Step 3: Cross multiply
    225.18x = 339.46 × 209.52
  4. Step 4: Simplify right side
    225.18x = 71,123.66
  5. Step 5: Solve for x
    x = 71,123.66/225.18
  6. Step 6: Final answer
    x = 315.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.