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Finding the Fourth Proportional to 221.75, 332.31 and 124.23

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Solution

The fourth proportional to 221.75, 332.31 and 124.23 is: 186.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.75 : 332.31 = 124.23 : x
  2. Step 2: Convert to fraction form
    221.75/332.31 = 124.23/x
  3. Step 3: Cross multiply
    221.75x = 332.31 × 124.23
  4. Step 4: Simplify right side
    221.75x = 41,282.87
  5. Step 5: Solve for x
    x = 41,282.87/221.75
  6. Step 6: Final answer
    x = 186.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.