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Finding the Fourth Proportional to 225.35, 311.00 and 127.11

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Solution

The fourth proportional to 225.35, 311.00 and 127.11 is: 175.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.35 : 311.00 = 127.11 : x
  2. Step 2: Convert to fraction form
    225.35/311.00 = 127.11/x
  3. Step 3: Cross multiply
    225.35x = 311.00 × 127.11
  4. Step 4: Simplify right side
    225.35x = 39,530.57
  5. Step 5: Solve for x
    x = 39,530.57/225.35
  6. Step 6: Final answer
    x = 175.42

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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.