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Finding the Fourth Proportional to 225.21, 310.79 and 124.27

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Solution

The fourth proportional to 225.21, 310.79 and 124.27 is: 171.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.21 : 310.79 = 124.27 : x
  2. Step 2: Convert to fraction form
    225.21/310.79 = 124.27/x
  3. Step 3: Cross multiply
    225.21x = 310.79 × 124.27
  4. Step 4: Simplify right side
    225.21x = 38,621.80
  5. Step 5: Solve for x
    x = 38,621.80/225.21
  6. Step 6: Final answer
    x = 171.49

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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.