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Finding the Fourth Proportional to 1,600.13, 2,398.31 and 721.61

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Solution

The fourth proportional to 1,600.13, 2,398.31 and 721.61 is: 1,081.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,600.13 : 2,398.31 = 721.61 : x
  2. Step 2: Convert to fraction form
    1,600.13/2,398.31 = 721.61/x
  3. Step 3: Cross multiply
    1,600.13x = 2,398.31 × 721.61
  4. Step 4: Simplify right side
    1,600.13x = 1,730,640.58
  5. Step 5: Solve for x
    x = 1,730,640.58/1,600.13
  6. Step 6: Final answer
    x = 1,081.56

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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.