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Finding the Fourth Proportional to 268.46, 402.68 and 122.21

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Solution

The fourth proportional to 268.46, 402.68 and 122.21 is: 183.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.46 : 402.68 = 122.21 : x
  2. Step 2: Convert to fraction form
    268.46/402.68 = 122.21/x
  3. Step 3: Cross multiply
    268.46x = 402.68 × 122.21
  4. Step 4: Simplify right side
    268.46x = 49,211.52
  5. Step 5: Solve for x
    x = 49,211.52/268.46
  6. Step 6: Final answer
    x = 183.31

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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.