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Finding the Fourth Proportional to 3,398.49, 4,689.63 and 1,982.48

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Solution

The fourth proportional to 3,398.49, 4,689.63 and 1,982.48 is: 2,735.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,398.49 : 4,689.63 = 1,982.48 : x
  2. Step 2: Convert to fraction form
    3,398.49/4,689.63 = 1,982.48/x
  3. Step 3: Cross multiply
    3,398.49x = 4,689.63 × 1,982.48
  4. Step 4: Simplify right side
    3,398.49x = 9,297,074.23
  5. Step 5: Solve for x
    x = 9,297,074.23/3,398.49
  6. Step 6: Final answer
    x = 2,735.65

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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.