Home / 1,721.08-2,581.44-680.86

Finding the Fourth Proportional to 1,721.08, 2,581.44 and 680.86

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Solution

The fourth proportional to 1,721.08, 2,581.44 and 680.86 is: 1,021.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.08 : 2,581.44 = 680.86 : x
  2. Step 2: Convert to fraction form
    1,721.08/2,581.44 = 680.86/x
  3. Step 3: Cross multiply
    1,721.08x = 2,581.44 × 680.86
  4. Step 4: Simplify right side
    1,721.08x = 1,757,599.24
  5. Step 5: Solve for x
    x = 1,757,599.24/1,721.08
  6. Step 6: Final answer
    x = 1,021.22

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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.