Home / 2,780.25-3,836.85-1,585.43

Finding the Fourth Proportional to 2,780.25, 3,836.85 and 1,585.43

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Solution

The fourth proportional to 2,780.25, 3,836.85 and 1,585.43 is: 2,187.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.25 : 3,836.85 = 1,585.43 : x
  2. Step 2: Convert to fraction form
    2,780.25/3,836.85 = 1,585.43/x
  3. Step 3: Cross multiply
    2,780.25x = 3,836.85 × 1,585.43
  4. Step 4: Simplify right side
    2,780.25x = 6,083,037.91
  5. Step 5: Solve for x
    x = 6,083,037.91/2,780.25
  6. Step 6: Final answer
    x = 2,187.95

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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.