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Finding the Fourth Proportional to 225.39, 310.98 and 127.11

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Solution

The fourth proportional to 225.39, 310.98 and 127.11 is: 175.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.39 : 310.98 = 127.11 : x
  2. Step 2: Convert to fraction form
    225.39/310.98 = 127.11/x
  3. Step 3: Cross multiply
    225.39x = 310.98 × 127.11
  4. Step 4: Simplify right side
    225.39x = 39,528.67
  5. Step 5: Solve for x
    x = 39,528.67/225.39
  6. Step 6: Final answer
    x = 175.38

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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.