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Finding the Fourth Proportional to 225.42, 311.16 and 151.76

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Solution

The fourth proportional to 225.42, 311.16 and 151.76 is: 209.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.42 : 311.16 = 151.76 : x
  2. Step 2: Convert to fraction form
    225.42/311.16 = 151.76/x
  3. Step 3: Cross multiply
    225.42x = 311.16 × 151.76
  4. Step 4: Simplify right side
    225.42x = 47,221.64
  5. Step 5: Solve for x
    x = 47,221.64/225.42
  6. Step 6: Final answer
    x = 209.48

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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.