Home / 2,780.20-3,836.56-1,601.47

Finding the Fourth Proportional to 2,780.20, 3,836.56 and 1,601.47

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Solution

The fourth proportional to 2,780.20, 3,836.56 and 1,601.47 is: 2,209.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.20 : 3,836.56 = 1,601.47 : x
  2. Step 2: Convert to fraction form
    2,780.20/3,836.56 = 1,601.47/x
  3. Step 3: Cross multiply
    2,780.20x = 3,836.56 × 1,601.47
  4. Step 4: Simplify right side
    2,780.20x = 6,144,135.74
  5. Step 5: Solve for x
    x = 6,144,135.74/2,780.20
  6. Step 6: Final answer
    x = 2,209.96

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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.