Home / 2,279.90-3,138.36-1,966.21

Finding the Fourth Proportional to 2,279.90, 3,138.36 and 1,966.21

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Solution

The fourth proportional to 2,279.90, 3,138.36 and 1,966.21 is: 2,706.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.90 : 3,138.36 = 1,966.21 : x
  2. Step 2: Convert to fraction form
    2,279.90/3,138.36 = 1,966.21/x
  3. Step 3: Cross multiply
    2,279.90x = 3,138.36 × 1,966.21
  4. Step 4: Simplify right side
    2,279.90x = 6,170,659.12
  5. Step 5: Solve for x
    x = 6,170,659.12/2,279.90
  6. Step 6: Final answer
    x = 2,706.55

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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.