Home / 2,686.20-4,029.30-1,519.80

Finding the Fourth Proportional to 2,686.20, 4,029.30 and 1,519.80

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Solution

The fourth proportional to 2,686.20, 4,029.30 and 1,519.80 is: 2,279.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.20 : 4,029.30 = 1,519.80 : x
  2. Step 2: Convert to fraction form
    2,686.20/4,029.30 = 1,519.80/x
  3. Step 3: Cross multiply
    2,686.20x = 4,029.30 × 1,519.80
  4. Step 4: Simplify right side
    2,686.20x = 6,123,730.14
  5. Step 5: Solve for x
    x = 6,123,730.14/2,686.20
  6. Step 6: Final answer
    x = 2,279.70

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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.