Home / 2,151.20-3,224.40-851.76

Finding the Fourth Proportional to 2,151.20, 3,224.40 and 851.76

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Solution

The fourth proportional to 2,151.20, 3,224.40 and 851.76 is: 1,276.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.20 : 3,224.40 = 851.76 : x
  2. Step 2: Convert to fraction form
    2,151.20/3,224.40 = 851.76/x
  3. Step 3: Cross multiply
    2,151.20x = 3,224.40 × 851.76
  4. Step 4: Simplify right side
    2,151.20x = 2,746,414.94
  5. Step 5: Solve for x
    x = 2,746,414.94/2,151.20
  6. Step 6: Final answer
    x = 1,276.69

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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.