Home / 2,079.28-3,121.40-1,646.80

Finding the Fourth Proportional to 2,079.28, 3,121.40 and 1,646.80

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Solution

The fourth proportional to 2,079.28, 3,121.40 and 1,646.80 is: 2,472.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.28 : 3,121.40 = 1,646.80 : x
  2. Step 2: Convert to fraction form
    2,079.28/3,121.40 = 1,646.80/x
  3. Step 3: Cross multiply
    2,079.28x = 3,121.40 × 1,646.80
  4. Step 4: Simplify right side
    2,079.28x = 5,140,321.52
  5. Step 5: Solve for x
    x = 5,140,321.52/2,079.28
  6. Step 6: Final answer
    x = 2,472.16

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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.