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Finding the Fourth Proportional to 273.64, 410.43 and 81.25

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Solution

The fourth proportional to 273.64, 410.43 and 81.25 is: 121.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.64 : 410.43 = 81.25 : x
  2. Step 2: Convert to fraction form
    273.64/410.43 = 81.25/x
  3. Step 3: Cross multiply
    273.64x = 410.43 × 81.25
  4. Step 4: Simplify right side
    273.64x = 33,347.44
  5. Step 5: Solve for x
    x = 33,347.44/273.64
  6. Step 6: Final answer
    x = 121.87

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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.