Home / 3,418.80-5,128.17-1,339.02

Finding the Fourth Proportional to 3,418.80, 5,128.17 and 1,339.02

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Solution

The fourth proportional to 3,418.80, 5,128.17 and 1,339.02 is: 2,008.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,418.80 : 5,128.17 = 1,339.02 : x
  2. Step 2: Convert to fraction form
    3,418.80/5,128.17 = 1,339.02/x
  3. Step 3: Cross multiply
    3,418.80x = 5,128.17 × 1,339.02
  4. Step 4: Simplify right side
    3,418.80x = 6,866,722.19
  5. Step 5: Solve for x
    x = 6,866,722.19/3,418.80
  6. Step 6: Final answer
    x = 2,008.52

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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.