Home / 2,189.12-3,279.71-1,878.08

Finding the Fourth Proportional to 2,189.12, 3,279.71 and 1,878.08

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Solution

The fourth proportional to 2,189.12, 3,279.71 and 1,878.08 is: 2,813.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.12 : 3,279.71 = 1,878.08 : x
  2. Step 2: Convert to fraction form
    2,189.12/3,279.71 = 1,878.08/x
  3. Step 3: Cross multiply
    2,189.12x = 3,279.71 × 1,878.08
  4. Step 4: Simplify right side
    2,189.12x = 6,159,531.97
  5. Step 5: Solve for x
    x = 6,159,531.97/2,189.12
  6. Step 6: Final answer
    x = 2,813.71

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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.