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Finding the Fourth Proportional to 2,781.33, 4,172.58 and 806.96

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Solution

The fourth proportional to 2,781.33, 4,172.58 and 806.96 is: 1,210.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.33 : 4,172.58 = 806.96 : x
  2. Step 2: Convert to fraction form
    2,781.33/4,172.58 = 806.96/x
  3. Step 3: Cross multiply
    2,781.33x = 4,172.58 × 806.96
  4. Step 4: Simplify right side
    2,781.33x = 3,367,084.29
  5. Step 5: Solve for x
    x = 3,367,084.29/2,781.33
  6. Step 6: Final answer
    x = 1,210.60

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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.