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Finding the Fourth Proportional to 1,843.44, 2,763 and 869.28

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Solution

The fourth proportional to 1,843.44, 2,763 and 869.28 is: 1,302.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,843.44 : 2,763 = 869.28 : x
  2. Step 2: Convert to fraction form
    1,843.44/2,763 = 869.28/x
  3. Step 3: Cross multiply
    1,843.44x = 2,763 × 869.28
  4. Step 4: Simplify right side
    1,843.44x = 2,401,820.64
  5. Step 5: Solve for x
    x = 2,401,820.64/1,843.44
  6. Step 6: Final answer
    x = 1,302.90

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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.