Home / 3,399.12-4,691.40-1,983

Finding the Fourth Proportional to 3,399.12, 4,691.40 and 1,983

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Solution

The fourth proportional to 3,399.12, 4,691.40 and 1,983 is: 2,736.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,399.12 : 4,691.40 = 1,983 : x
  2. Step 2: Convert to fraction form
    3,399.12/4,691.40 = 1,983/x
  3. Step 3: Cross multiply
    3,399.12x = 4,691.40 × 1,983
  4. Step 4: Simplify right side
    3,399.12x = 9,303,046.20
  5. Step 5: Solve for x
    x = 9,303,046.20/3,399.12
  6. Step 6: Final answer
    x = 2,736.90

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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.