Home / 2,189.80-3,279.48-1,263.42

Finding the Fourth Proportional to 2,189.80, 3,279.48 and 1,263.42

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Solution

The fourth proportional to 2,189.80, 3,279.48 and 1,263.42 is: 1,892.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.80 : 3,279.48 = 1,263.42 : x
  2. Step 2: Convert to fraction form
    2,189.80/3,279.48 = 1,263.42/x
  3. Step 3: Cross multiply
    2,189.80x = 3,279.48 × 1,263.42
  4. Step 4: Simplify right side
    2,189.80x = 4,143,360.62
  5. Step 5: Solve for x
    x = 4,143,360.62/2,189.80
  6. Step 6: Final answer
    x = 1,892.12

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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.