Home / 3,920.27-5,879.12-1,287.06

Finding the Fourth Proportional to 3,920.27, 5,879.12 and 1,287.06

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Solution

The fourth proportional to 3,920.27, 5,879.12 and 1,287.06 is: 1,930.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.27 : 5,879.12 = 1,287.06 : x
  2. Step 2: Convert to fraction form
    3,920.27/5,879.12 = 1,287.06/x
  3. Step 3: Cross multiply
    3,920.27x = 5,879.12 × 1,287.06
  4. Step 4: Simplify right side
    3,920.27x = 7,566,751.71
  5. Step 5: Solve for x
    x = 7,566,751.71/3,920.27
  6. Step 6: Final answer
    x = 1,930.16

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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.