Home / 2,780.80-3,837.24-1,661.51

Finding the Fourth Proportional to 2,780.80, 3,837.24 and 1,661.51

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Solution

The fourth proportional to 2,780.80, 3,837.24 and 1,661.51 is: 2,292.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.80 : 3,837.24 = 1,661.51 : x
  2. Step 2: Convert to fraction form
    2,780.80/3,837.24 = 1,661.51/x
  3. Step 3: Cross multiply
    2,780.80x = 3,837.24 × 1,661.51
  4. Step 4: Simplify right side
    2,780.80x = 6,375,622.23
  5. Step 5: Solve for x
    x = 6,375,622.23/2,780.80
  6. Step 6: Final answer
    x = 2,292.73

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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.