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Finding the Fourth Proportional to 1,305.33, 1,800.78 and 800.79

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Solution

The fourth proportional to 1,305.33, 1,800.78 and 800.79 is: 1,104.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.33 : 1,800.78 = 800.79 : x
  2. Step 2: Convert to fraction form
    1,305.33/1,800.78 = 800.79/x
  3. Step 3: Cross multiply
    1,305.33x = 1,800.78 × 800.79
  4. Step 4: Simplify right side
    1,305.33x = 1,442,046.62
  5. Step 5: Solve for x
    x = 1,442,046.62/1,305.33
  6. Step 6: Final answer
    x = 1,104.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.