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Finding the Fourth Proportional to 1,327.88, 1,995.36 and 679.04

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Solution

The fourth proportional to 1,327.88, 1,995.36 and 679.04 is: 1,020.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.88 : 1,995.36 = 679.04 : x
  2. Step 2: Convert to fraction form
    1,327.88/1,995.36 = 679.04/x
  3. Step 3: Cross multiply
    1,327.88x = 1,995.36 × 679.04
  4. Step 4: Simplify right side
    1,327.88x = 1,354,929.25
  5. Step 5: Solve for x
    x = 1,354,929.25/1,327.88
  6. Step 6: Final answer
    x = 1,020.37

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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.