Home / 2,163.50-2,987.07-1,279.59

Finding the Fourth Proportional to 2,163.50, 2,987.07 and 1,279.59

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Solution

The fourth proportional to 2,163.50, 2,987.07 and 1,279.59 is: 1,766.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.50 : 2,987.07 = 1,279.59 : x
  2. Step 2: Convert to fraction form
    2,163.50/2,987.07 = 1,279.59/x
  3. Step 3: Cross multiply
    2,163.50x = 2,987.07 × 1,279.59
  4. Step 4: Simplify right side
    2,163.50x = 3,822,209.97
  5. Step 5: Solve for x
    x = 3,822,209.97/2,163.50
  6. Step 6: Final answer
    x = 1,766.68

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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.