Home / 1,331.28-1,982.16-1,324.80

Finding the Fourth Proportional to 1,331.28, 1,982.16 and 1,324.80

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Solution

The fourth proportional to 1,331.28, 1,982.16 and 1,324.80 is: 1,972.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.28 : 1,982.16 = 1,324.80 : x
  2. Step 2: Convert to fraction form
    1,331.28/1,982.16 = 1,324.80/x
  3. Step 3: Cross multiply
    1,331.28x = 1,982.16 × 1,324.80
  4. Step 4: Simplify right side
    1,331.28x = 2,625,965.57
  5. Step 5: Solve for x
    x = 2,625,965.57/1,331.28
  6. Step 6: Final answer
    x = 1,972.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.