Home / 2,179.68-3,006.42-1,339.80

Finding the Fourth Proportional to 2,179.68, 3,006.42 and 1,339.80

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Solution

The fourth proportional to 2,179.68, 3,006.42 and 1,339.80 is: 1,847.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.68 : 3,006.42 = 1,339.80 : x
  2. Step 2: Convert to fraction form
    2,179.68/3,006.42 = 1,339.80/x
  3. Step 3: Cross multiply
    2,179.68x = 3,006.42 × 1,339.80
  4. Step 4: Simplify right side
    2,179.68x = 4,028,001.52
  5. Step 5: Solve for x
    x = 4,028,001.52/2,179.68
  6. Step 6: Final answer
    x = 1,847.98

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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.