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Finding the Fourth Proportional to 2,781.08, 4,170.93 and 806.29

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Solution

The fourth proportional to 2,781.08, 4,170.93 and 806.29 is: 1,209.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.08 : 4,170.93 = 806.29 : x
  2. Step 2: Convert to fraction form
    2,781.08/4,170.93 = 806.29/x
  3. Step 3: Cross multiply
    2,781.08x = 4,170.93 × 806.29
  4. Step 4: Simplify right side
    2,781.08x = 3,362,962.85
  5. Step 5: Solve for x
    x = 3,362,962.85/2,781.08
  6. Step 6: Final answer
    x = 1,209.23

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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.