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Finding the Fourth Proportional to 225.30, 310.89 and 151.76

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Solution

The fourth proportional to 225.30, 310.89 and 151.76 is: 209.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.30 : 310.89 = 151.76 : x
  2. Step 2: Convert to fraction form
    225.30/310.89 = 151.76/x
  3. Step 3: Cross multiply
    225.30x = 310.89 × 151.76
  4. Step 4: Simplify right side
    225.30x = 47,179.11
  5. Step 5: Solve for x
    x = 47,179.11/225.30
  6. Step 6: Final answer
    x = 209.41

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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.