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Finding the Fourth Proportional to 225.16, 310.73 and 126.92

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Solution

The fourth proportional to 225.16, 310.73 and 126.92 is: 175.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.16 : 310.73 = 126.92 : x
  2. Step 2: Convert to fraction form
    225.16/310.73 = 126.92/x
  3. Step 3: Cross multiply
    225.16x = 310.73 × 126.92
  4. Step 4: Simplify right side
    225.16x = 39,437.99
  5. Step 5: Solve for x
    x = 39,437.99/225.16
  6. Step 6: Final answer
    x = 175.16

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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.