Home / 2,648.88-3,972.82-1,187.76

Finding the Fourth Proportional to 2,648.88, 3,972.82 and 1,187.76

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Solution

The fourth proportional to 2,648.88, 3,972.82 and 1,187.76 is: 1,781.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,648.88 : 3,972.82 = 1,187.76 : x
  2. Step 2: Convert to fraction form
    2,648.88/3,972.82 = 1,187.76/x
  3. Step 3: Cross multiply
    2,648.88x = 3,972.82 × 1,187.76
  4. Step 4: Simplify right side
    2,648.88x = 4,718,756.68
  5. Step 5: Solve for x
    x = 4,718,756.68/2,648.88
  6. Step 6: Final answer
    x = 1,781.42

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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.