Home / 1,721.86-2,581.27-1,309.97

Finding the Fourth Proportional to 1,721.86, 2,581.27 and 1,309.97

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Solution

The fourth proportional to 1,721.86, 2,581.27 and 1,309.97 is: 1,963.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.86 : 2,581.27 = 1,309.97 : x
  2. Step 2: Convert to fraction form
    1,721.86/2,581.27 = 1,309.97/x
  3. Step 3: Cross multiply
    1,721.86x = 2,581.27 × 1,309.97
  4. Step 4: Simplify right side
    1,721.86x = 3,381,389.44
  5. Step 5: Solve for x
    x = 3,381,389.44/1,721.86
  6. Step 6: Final answer
    x = 1,963.80

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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.