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Finding the Fourth Proportional to 1,229.82, 1,844.19 and 864.78

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Solution

The fourth proportional to 1,229.82, 1,844.19 and 864.78 is: 1,296.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.82 : 1,844.19 = 864.78 : x
  2. Step 2: Convert to fraction form
    1,229.82/1,844.19 = 864.78/x
  3. Step 3: Cross multiply
    1,229.82x = 1,844.19 × 864.78
  4. Step 4: Simplify right side
    1,229.82x = 1,594,818.63
  5. Step 5: Solve for x
    x = 1,594,818.63/1,229.82
  6. Step 6: Final answer
    x = 1,296.79

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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.