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Finding the Fourth Proportional to 3,998.64, 5,999.34 and 1,659.90

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Solution

The fourth proportional to 3,998.64, 5,999.34 and 1,659.90 is: 2,490.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.64 : 5,999.34 = 1,659.90 : x
  2. Step 2: Convert to fraction form
    3,998.64/5,999.34 = 1,659.90/x
  3. Step 3: Cross multiply
    3,998.64x = 5,999.34 × 1,659.90
  4. Step 4: Simplify right side
    3,998.64x = 9,958,304.47
  5. Step 5: Solve for x
    x = 9,958,304.47/3,998.64
  6. Step 6: Final answer
    x = 2,490.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.