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Finding the Fourth Proportional to 2,247.84, 3,370.44 and 861.30

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Solution

The fourth proportional to 2,247.84, 3,370.44 and 861.30 is: 1,291.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,247.84 : 3,370.44 = 861.30 : x
  2. Step 2: Convert to fraction form
    2,247.84/3,370.44 = 861.30/x
  3. Step 3: Cross multiply
    2,247.84x = 3,370.44 × 861.30
  4. Step 4: Simplify right side
    2,247.84x = 2,902,959.97
  5. Step 5: Solve for x
    x = 2,902,959.97/2,247.84
  6. Step 6: Final answer
    x = 1,291.44

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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.