Home / 2,113.20-3,169.56-880.80

Finding the Fourth Proportional to 2,113.20, 3,169.56 and 880.80

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Solution

The fourth proportional to 2,113.20, 3,169.56 and 880.80 is: 1,321.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.20 : 3,169.56 = 880.80 : x
  2. Step 2: Convert to fraction form
    2,113.20/3,169.56 = 880.80/x
  3. Step 3: Cross multiply
    2,113.20x = 3,169.56 × 880.80
  4. Step 4: Simplify right side
    2,113.20x = 2,791,748.45
  5. Step 5: Solve for x
    x = 2,791,748.45/2,113.20
  6. Step 6: Final answer
    x = 1,321.10

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1.5x scale

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.