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Finding the Fourth Proportional to 268.71, 402.71 and 122.48

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Solution

The fourth proportional to 268.71, 402.71 and 122.48 is: 183.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.71 : 402.71 = 122.48 : x
  2. Step 2: Convert to fraction form
    268.71/402.71 = 122.48/x
  3. Step 3: Cross multiply
    268.71x = 402.71 × 122.48
  4. Step 4: Simplify right side
    268.71x = 49,323.92
  5. Step 5: Solve for x
    x = 49,323.92/268.71
  6. Step 6: Final answer
    x = 183.56

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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.