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Finding the Fourth Proportional to 226.75, 312.90 and 127.16

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Solution

The fourth proportional to 226.75, 312.90 and 127.16 is: 175.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.75 : 312.90 = 127.16 : x
  2. Step 2: Convert to fraction form
    226.75/312.90 = 127.16/x
  3. Step 3: Cross multiply
    226.75x = 312.90 × 127.16
  4. Step 4: Simplify right side
    226.75x = 39,788.68
  5. Step 5: Solve for x
    x = 39,788.68/226.75
  6. Step 6: Final answer
    x = 175.48

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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.