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Finding the Fourth Proportional to 1,211.29, 1,816.92 and 800.33

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Solution

The fourth proportional to 1,211.29, 1,816.92 and 800.33 is: 1,200.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.29 : 1,816.92 = 800.33 : x
  2. Step 2: Convert to fraction form
    1,211.29/1,816.92 = 800.33/x
  3. Step 3: Cross multiply
    1,211.29x = 1,816.92 × 800.33
  4. Step 4: Simplify right side
    1,211.29x = 1,454,135.58
  5. Step 5: Solve for x
    x = 1,454,135.58/1,211.29
  6. Step 6: Final answer
    x = 1,200.49

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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.