Home / 2,747.86-4,120.82-1,187.80

Finding the Fourth Proportional to 2,747.86, 4,120.82 and 1,187.80

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Solution

The fourth proportional to 2,747.86, 4,120.82 and 1,187.80 is: 1,781.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,747.86 : 4,120.82 = 1,187.80 : x
  2. Step 2: Convert to fraction form
    2,747.86/4,120.82 = 1,187.80/x
  3. Step 3: Cross multiply
    2,747.86x = 4,120.82 × 1,187.80
  4. Step 4: Simplify right side
    2,747.86x = 4,894,710.00
  5. Step 5: Solve for x
    x = 4,894,710.00/2,747.86
  6. Step 6: Final answer
    x = 1,781.28

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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.