Home / 2,187.20-3,279.18-1,263.80

Finding the Fourth Proportional to 2,187.20, 3,279.18 and 1,263.80

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Solution

The fourth proportional to 2,187.20, 3,279.18 and 1,263.80 is: 1,894.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.20 : 3,279.18 = 1,263.80 : x
  2. Step 2: Convert to fraction form
    2,187.20/3,279.18 = 1,263.80/x
  3. Step 3: Cross multiply
    2,187.20x = 3,279.18 × 1,263.80
  4. Step 4: Simplify right side
    2,187.20x = 4,144,227.68
  5. Step 5: Solve for x
    x = 4,144,227.68/2,187.20
  6. Step 6: Final answer
    x = 1,894.76

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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.