Home / 2,780.75-3,836.82-1,661.52

Finding the Fourth Proportional to 2,780.75, 3,836.82 and 1,661.52

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Solution

The fourth proportional to 2,780.75, 3,836.82 and 1,661.52 is: 2,292.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.75 : 3,836.82 = 1,661.52 : x
  2. Step 2: Convert to fraction form
    2,780.75/3,836.82 = 1,661.52/x
  3. Step 3: Cross multiply
    2,780.75x = 3,836.82 × 1,661.52
  4. Step 4: Simplify right side
    2,780.75x = 6,374,953.17
  5. Step 5: Solve for x
    x = 6,374,953.17/2,780.75
  6. Step 6: Final answer
    x = 2,292.53

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1.5x scale

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.