Home / 2,618.66-3,930.26-1,386.95

Finding the Fourth Proportional to 2,618.66, 3,930.26 and 1,386.95

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Solution

The fourth proportional to 2,618.66, 3,930.26 and 1,386.95 is: 2,081.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618.66 : 3,930.26 = 1,386.95 : x
  2. Step 2: Convert to fraction form
    2,618.66/3,930.26 = 1,386.95/x
  3. Step 3: Cross multiply
    2,618.66x = 3,930.26 × 1,386.95
  4. Step 4: Simplify right side
    2,618.66x = 5,451,047.52
  5. Step 5: Solve for x
    x = 5,451,047.52/2,618.66
  6. Step 6: Final answer
    x = 2,081.62

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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.