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Finding the Fourth Proportional to 2,669.24, 4,003.38 and 721.19

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Solution

The fourth proportional to 2,669.24, 4,003.38 and 721.19 is: 1,081.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,669.24 : 4,003.38 = 721.19 : x
  2. Step 2: Convert to fraction form
    2,669.24/4,003.38 = 721.19/x
  3. Step 3: Cross multiply
    2,669.24x = 4,003.38 × 721.19
  4. Step 4: Simplify right side
    2,669.24x = 2,887,177.61
  5. Step 5: Solve for x
    x = 2,887,177.61/2,669.24
  6. Step 6: Final answer
    x = 1,081.65

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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.