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Finding the Fourth Proportional to 225.11, 310.65 and 126.86

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Solution

The fourth proportional to 225.11, 310.65 and 126.86 is: 175.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.11 : 310.65 = 126.86 : x
  2. Step 2: Convert to fraction form
    225.11/310.65 = 126.86/x
  3. Step 3: Cross multiply
    225.11x = 310.65 × 126.86
  4. Step 4: Simplify right side
    225.11x = 39,409.06
  5. Step 5: Solve for x
    x = 39,409.06/225.11
  6. Step 6: Final answer
    x = 175.07

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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.