Home / 2,780.98-3,836.88-1,661.38

Finding the Fourth Proportional to 2,780.98, 3,836.88 and 1,661.38

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Solution

The fourth proportional to 2,780.98, 3,836.88 and 1,661.38 is: 2,292.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.98 : 3,836.88 = 1,661.38 : x
  2. Step 2: Convert to fraction form
    2,780.98/3,836.88 = 1,661.38/x
  3. Step 3: Cross multiply
    2,780.98x = 3,836.88 × 1,661.38
  4. Step 4: Simplify right side
    2,780.98x = 6,374,515.69
  5. Step 5: Solve for x
    x = 6,374,515.69/2,780.98
  6. Step 6: Final answer
    x = 2,292.18

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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.