Home / 3,169.28-4,751.35-1,321.78

Finding the Fourth Proportional to 3,169.28, 4,751.35 and 1,321.78

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Solution

The fourth proportional to 3,169.28, 4,751.35 and 1,321.78 is: 1,981.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,169.28 : 4,751.35 = 1,321.78 : x
  2. Step 2: Convert to fraction form
    3,169.28/4,751.35 = 1,321.78/x
  3. Step 3: Cross multiply
    3,169.28x = 4,751.35 × 1,321.78
  4. Step 4: Simplify right side
    3,169.28x = 6,280,209.04
  5. Step 5: Solve for x
    x = 6,280,209.04/3,169.28
  6. Step 6: Final answer
    x = 1,981.59

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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.