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Finding the Fourth Proportional to 3,999.59, 5,996.82 and 1,661.21

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Solution

The fourth proportional to 3,999.59, 5,996.82 and 1,661.21 is: 2,490.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.59 : 5,996.82 = 1,661.21 : x
  2. Step 2: Convert to fraction form
    3,999.59/5,996.82 = 1,661.21/x
  3. Step 3: Cross multiply
    3,999.59x = 5,996.82 × 1,661.21
  4. Step 4: Simplify right side
    3,999.59x = 9,961,977.35
  5. Step 5: Solve for x
    x = 9,961,977.35/3,999.59
  6. Step 6: Final answer
    x = 2,490.75

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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.