Home / 3,107.31-4,288.42-1,781.44

Finding the Fourth Proportional to 3,107.31, 4,288.42 and 1,781.44

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Solution

The fourth proportional to 3,107.31, 4,288.42 and 1,781.44 is: 2,458.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.31 : 4,288.42 = 1,781.44 : x
  2. Step 2: Convert to fraction form
    3,107.31/4,288.42 = 1,781.44/x
  3. Step 3: Cross multiply
    3,107.31x = 4,288.42 × 1,781.44
  4. Step 4: Simplify right side
    3,107.31x = 7,639,573.54
  5. Step 5: Solve for x
    x = 7,639,573.54/3,107.31
  6. Step 6: Final answer
    x = 2,458.58

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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.