Home / 3,618.47-5,428.36-1,279.83

Finding the Fourth Proportional to 3,618.47, 5,428.36 and 1,279.83

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Solution

The fourth proportional to 3,618.47, 5,428.36 and 1,279.83 is: 1,919.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.47 : 5,428.36 = 1,279.83 : x
  2. Step 2: Convert to fraction form
    3,618.47/5,428.36 = 1,279.83/x
  3. Step 3: Cross multiply
    3,618.47x = 5,428.36 × 1,279.83
  4. Step 4: Simplify right side
    3,618.47x = 6,947,371.58
  5. Step 5: Solve for x
    x = 6,947,371.58/3,618.47
  6. Step 6: Final answer
    x = 1,919.97

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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.