Home / 2,781.35-4,172.87-1,115.47

Finding the Fourth Proportional to 2,781.35, 4,172.87 and 1,115.47

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Solution

The fourth proportional to 2,781.35, 4,172.87 and 1,115.47 is: 1,673.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.35 : 4,172.87 = 1,115.47 : x
  2. Step 2: Convert to fraction form
    2,781.35/4,172.87 = 1,115.47/x
  3. Step 3: Cross multiply
    2,781.35x = 4,172.87 × 1,115.47
  4. Step 4: Simplify right side
    2,781.35x = 4,654,713.03
  5. Step 5: Solve for x
    x = 4,654,713.03/2,781.35
  6. Step 6: Final answer
    x = 1,673.54

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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.