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Finding the Fourth Proportional to 1,324.62, 1,986.92 and 731.61

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Solution

The fourth proportional to 1,324.62, 1,986.92 and 731.61 is: 1,097.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.62 : 1,986.92 = 731.61 : x
  2. Step 2: Convert to fraction form
    1,324.62/1,986.92 = 731.61/x
  3. Step 3: Cross multiply
    1,324.62x = 1,986.92 × 731.61
  4. Step 4: Simplify right side
    1,324.62x = 1,453,649.63
  5. Step 5: Solve for x
    x = 1,453,649.63/1,324.62
  6. Step 6: Final answer
    x = 1,097.41

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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.