Home / 1,481.38-2,221.89-931.84

Finding the Fourth Proportional to 1,481.38, 2,221.89 and 931.84

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Solution

The fourth proportional to 1,481.38, 2,221.89 and 931.84 is: 1,397.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.38 : 2,221.89 = 931.84 : x
  2. Step 2: Convert to fraction form
    1,481.38/2,221.89 = 931.84/x
  3. Step 3: Cross multiply
    1,481.38x = 2,221.89 × 931.84
  4. Step 4: Simplify right side
    1,481.38x = 2,070,445.98
  5. Step 5: Solve for x
    x = 2,070,445.98/1,481.38
  6. Step 6: Final answer
    x = 1,397.65

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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.