Home / 3,789.74-5,685.15-1,121.60

Finding the Fourth Proportional to 3,789.74, 5,685.15 and 1,121.60

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Solution

The fourth proportional to 3,789.74, 5,685.15 and 1,121.60 is: 1,682.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,789.74 : 5,685.15 = 1,121.60 : x
  2. Step 2: Convert to fraction form
    3,789.74/5,685.15 = 1,121.60/x
  3. Step 3: Cross multiply
    3,789.74x = 5,685.15 × 1,121.60
  4. Step 4: Simplify right side
    3,789.74x = 6,376,464.24
  5. Step 5: Solve for x
    x = 6,376,464.24/3,789.74
  6. Step 6: Final answer
    x = 1,682.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.