Home / 2,780.31-3,836.18-1,661.61

Finding the Fourth Proportional to 2,780.31, 3,836.18 and 1,661.61

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Solution

The fourth proportional to 2,780.31, 3,836.18 and 1,661.61 is: 2,292.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.31 : 3,836.18 = 1,661.61 : x
  2. Step 2: Convert to fraction form
    2,780.31/3,836.18 = 1,661.61/x
  3. Step 3: Cross multiply
    2,780.31x = 3,836.18 × 1,661.61
  4. Step 4: Simplify right side
    2,780.31x = 6,374,207.56
  5. Step 5: Solve for x
    x = 6,374,207.56/2,780.31
  6. Step 6: Final answer
    x = 2,292.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.