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Finding the Fourth Proportional to 2,669.29, 4,003.39 and 721.03

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Solution

The fourth proportional to 2,669.29, 4,003.39 and 721.03 is: 1,081.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,669.29 : 4,003.39 = 721.03 : x
  2. Step 2: Convert to fraction form
    2,669.29/4,003.39 = 721.03/x
  3. Step 3: Cross multiply
    2,669.29x = 4,003.39 × 721.03
  4. Step 4: Simplify right side
    2,669.29x = 2,886,564.29
  5. Step 5: Solve for x
    x = 2,886,564.29/2,669.29
  6. Step 6: Final answer
    x = 1,081.40

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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.