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Finding the Fourth Proportional to 1,481.11, 2,221.67 and 615.42

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Solution

The fourth proportional to 1,481.11, 2,221.67 and 615.42 is: 923.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.11 : 2,221.67 = 615.42 : x
  2. Step 2: Convert to fraction form
    1,481.11/2,221.67 = 615.42/x
  3. Step 3: Cross multiply
    1,481.11x = 2,221.67 × 615.42
  4. Step 4: Simplify right side
    1,481.11x = 1,367,261.69
  5. Step 5: Solve for x
    x = 1,367,261.69/1,481.11
  6. Step 6: Final answer
    x = 923.13

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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.