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Finding the Fourth Proportional to 2,169.76, 3,255.36 and 1,074.88

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Solution

The fourth proportional to 2,169.76, 3,255.36 and 1,074.88 is: 1,612.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.76 : 3,255.36 = 1,074.88 : x
  2. Step 2: Convert to fraction form
    2,169.76/3,255.36 = 1,074.88/x
  3. Step 3: Cross multiply
    2,169.76x = 3,255.36 × 1,074.88
  4. Step 4: Simplify right side
    2,169.76x = 3,499,121.36
  5. Step 5: Solve for x
    x = 3,499,121.36/2,169.76
  6. Step 6: Final answer
    x = 1,612.68

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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.