Home / 1,481.28-2,043.18-891.20

Finding the Fourth Proportional to 1,481.28, 2,043.18 and 891.20

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Solution

The fourth proportional to 1,481.28, 2,043.18 and 891.20 is: 1,229.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.28 : 2,043.18 = 891.20 : x
  2. Step 2: Convert to fraction form
    1,481.28/2,043.18 = 891.20/x
  3. Step 3: Cross multiply
    1,481.28x = 2,043.18 × 891.20
  4. Step 4: Simplify right side
    1,481.28x = 1,820,882.02
  5. Step 5: Solve for x
    x = 1,820,882.02/1,481.28
  6. Step 6: Final answer
    x = 1,229.26

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1.5x scale

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.