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Finding the Fourth Proportional to 2,781.86, 4,173.48 and 834.08

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Solution

The fourth proportional to 2,781.86, 4,173.48 and 834.08 is: 1,251.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.86 : 4,173.48 = 834.08 : x
  2. Step 2: Convert to fraction form
    2,781.86/4,173.48 = 834.08/x
  3. Step 3: Cross multiply
    2,781.86x = 4,173.48 × 834.08
  4. Step 4: Simplify right side
    2,781.86x = 3,481,016.20
  5. Step 5: Solve for x
    x = 3,481,016.20/2,781.86
  6. Step 6: Final answer
    x = 1,251.33

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1.5x scale

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.