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Finding the Fourth Proportional to 3,399.31, 4,691.28 and 1,982.89

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Solution

The fourth proportional to 3,399.31, 4,691.28 and 1,982.89 is: 2,736.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,399.31 : 4,691.28 = 1,982.89 : x
  2. Step 2: Convert to fraction form
    3,399.31/4,691.28 = 1,982.89/x
  3. Step 3: Cross multiply
    3,399.31x = 4,691.28 × 1,982.89
  4. Step 4: Simplify right side
    3,399.31x = 9,302,292.20
  5. Step 5: Solve for x
    x = 9,302,292.20/3,399.31
  6. Step 6: Final answer
    x = 2,736.52

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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.