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Finding the Fourth Proportional to 2,247.83, 3,372.20 and 861.21

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Solution

The fourth proportional to 2,247.83, 3,372.20 and 861.21 is: 1,291.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,247.83 : 3,372.20 = 861.21 : x
  2. Step 2: Convert to fraction form
    2,247.83/3,372.20 = 861.21/x
  3. Step 3: Cross multiply
    2,247.83x = 3,372.20 × 861.21
  4. Step 4: Simplify right side
    2,247.83x = 2,904,171.29
  5. Step 5: Solve for x
    x = 2,904,171.29/2,247.83
  6. Step 6: Final answer
    x = 1,291.99

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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.