Home / 2,489.10-3,432.68-1,991.76

Finding the Fourth Proportional to 2,489.10, 3,432.68 and 1,991.76

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Solution

The fourth proportional to 2,489.10, 3,432.68 and 1,991.76 is: 2,746.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.10 : 3,432.68 = 1,991.76 : x
  2. Step 2: Convert to fraction form
    2,489.10/3,432.68 = 1,991.76/x
  3. Step 3: Cross multiply
    2,489.10x = 3,432.68 × 1,991.76
  4. Step 4: Simplify right side
    2,489.10x = 6,837,074.72
  5. Step 5: Solve for x
    x = 6,837,074.72/2,489.10
  6. Step 6: Final answer
    x = 2,746.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.