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Finding the Fourth Proportional to 2,179.20, 3,266.78 and 881.58

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Solution

The fourth proportional to 2,179.20, 3,266.78 and 881.58 is: 1,321.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.20 : 3,266.78 = 881.58 : x
  2. Step 2: Convert to fraction form
    2,179.20/3,266.78 = 881.58/x
  3. Step 3: Cross multiply
    2,179.20x = 3,266.78 × 881.58
  4. Step 4: Simplify right side
    2,179.20x = 2,879,923.50
  5. Step 5: Solve for x
    x = 2,879,923.50/2,179.20
  6. Step 6: Final answer
    x = 1,321.55

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1.5x scale

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.