Home / 2,177.17-3,266.72-861.32

Finding the Fourth Proportional to 2,177.17, 3,266.72 and 861.32

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Solution

The fourth proportional to 2,177.17, 3,266.72 and 861.32 is: 1,292.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,177.17 : 3,266.72 = 861.32 : x
  2. Step 2: Convert to fraction form
    2,177.17/3,266.72 = 861.32/x
  3. Step 3: Cross multiply
    2,177.17x = 3,266.72 × 861.32
  4. Step 4: Simplify right side
    2,177.17x = 2,813,691.27
  5. Step 5: Solve for x
    x = 2,813,691.27/2,177.17
  6. Step 6: Final answer
    x = 1,292.36

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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.