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Finding the Fourth Proportional to 273.79, 410.68 and 81.41

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Solution

The fourth proportional to 273.79, 410.68 and 81.41 is: 122.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.79 : 410.68 = 81.41 : x
  2. Step 2: Convert to fraction form
    273.79/410.68 = 81.41/x
  3. Step 3: Cross multiply
    273.79x = 410.68 × 81.41
  4. Step 4: Simplify right side
    273.79x = 33,433.05
  5. Step 5: Solve for x
    x = 33,433.05/273.79
  6. Step 6: Final answer
    x = 122.11

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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.