Home / 3,098.40-4,275.20-1,979.52

Finding the Fourth Proportional to 3,098.40, 4,275.20 and 1,979.52

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Solution

The fourth proportional to 3,098.40, 4,275.20 and 1,979.52 is: 2,731.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,098.40 : 4,275.20 = 1,979.52 : x
  2. Step 2: Convert to fraction form
    3,098.40/4,275.20 = 1,979.52/x
  3. Step 3: Cross multiply
    3,098.40x = 4,275.20 × 1,979.52
  4. Step 4: Simplify right side
    3,098.40x = 8,462,843.90
  5. Step 5: Solve for x
    x = 8,462,843.90/3,098.40
  6. Step 6: Final answer
    x = 2,731.36

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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.