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Finding the Fourth Proportional to 225.25, 310.79 and 137.92

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Solution

The fourth proportional to 225.25, 310.79 and 137.92 is: 190.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.25 : 310.79 = 137.92 : x
  2. Step 2: Convert to fraction form
    225.25/310.79 = 137.92/x
  3. Step 3: Cross multiply
    225.25x = 310.79 × 137.92
  4. Step 4: Simplify right side
    225.25x = 42,863.53
  5. Step 5: Solve for x
    x = 42,863.53/225.25
  6. Step 6: Final answer
    x = 190.30

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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.