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Finding the Fourth Proportional to 225.18, 310.56 and 151.38

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Solution

The fourth proportional to 225.18, 310.56 and 151.38 is: 208.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.18 : 310.56 = 151.38 : x
  2. Step 2: Convert to fraction form
    225.18/310.56 = 151.38/x
  3. Step 3: Cross multiply
    225.18x = 310.56 × 151.38
  4. Step 4: Simplify right side
    225.18x = 47,012.57
  5. Step 5: Solve for x
    x = 47,012.57/225.18
  6. Step 6: Final answer
    x = 208.78

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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.