Home / 2,780.11-3,837-1,660.69

Finding the Fourth Proportional to 2,780.11, 3,837 and 1,660.69

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Solution

The fourth proportional to 2,780.11, 3,837 and 1,660.69 is: 2,292.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.11 : 3,837 = 1,660.69 : x
  2. Step 2: Convert to fraction form
    2,780.11/3,837 = 1,660.69/x
  3. Step 3: Cross multiply
    2,780.11x = 3,837 × 1,660.69
  4. Step 4: Simplify right side
    2,780.11x = 6,372,067.53
  5. Step 5: Solve for x
    x = 6,372,067.53/2,780.11
  6. Step 6: Final answer
    x = 2,292.02

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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.