Home / 3,058.28-4,221.12-1,940.78

Finding the Fourth Proportional to 3,058.28, 4,221.12 and 1,940.78

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Solution

The fourth proportional to 3,058.28, 4,221.12 and 1,940.78 is: 2,678.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,058.28 : 4,221.12 = 1,940.78 : x
  2. Step 2: Convert to fraction form
    3,058.28/4,221.12 = 1,940.78/x
  3. Step 3: Cross multiply
    3,058.28x = 4,221.12 × 1,940.78
  4. Step 4: Simplify right side
    3,058.28x = 8,192,265.27
  5. Step 5: Solve for x
    x = 8,192,265.27/3,058.28
  6. Step 6: Final answer
    x = 2,678.72

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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.