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Finding the Fourth Proportional to 2,177.12, 3,267.12 and 861.68

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Solution

The fourth proportional to 2,177.12, 3,267.12 and 861.68 is: 1,293.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,177.12 : 3,267.12 = 861.68 : x
  2. Step 2: Convert to fraction form
    2,177.12/3,267.12 = 861.68/x
  3. Step 3: Cross multiply
    2,177.12x = 3,267.12 × 861.68
  4. Step 4: Simplify right side
    2,177.12x = 2,815,211.96
  5. Step 5: Solve for x
    x = 2,815,211.96/2,177.12
  6. Step 6: Final answer
    x = 1,293.09

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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.