Home / 2,279.40-3,418.65-1,109.40

Finding the Fourth Proportional to 2,279.40, 3,418.65 and 1,109.40

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Solution

The fourth proportional to 2,279.40, 3,418.65 and 1,109.40 is: 1,663.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.40 : 3,418.65 = 1,109.40 : x
  2. Step 2: Convert to fraction form
    2,279.40/3,418.65 = 1,109.40/x
  3. Step 3: Cross multiply
    2,279.40x = 3,418.65 × 1,109.40
  4. Step 4: Simplify right side
    2,279.40x = 3,792,650.31
  5. Step 5: Solve for x
    x = 3,792,650.31/2,279.40
  6. Step 6: Final answer
    x = 1,663.88

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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.