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Finding the Fourth Proportional to 3,755.72, 5,631.19 and 1,999.64

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Solution

The fourth proportional to 3,755.72, 5,631.19 and 1,999.64 is: 2,998.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,755.72 : 5,631.19 = 1,999.64 : x
  2. Step 2: Convert to fraction form
    3,755.72/5,631.19 = 1,999.64/x
  3. Step 3: Cross multiply
    3,755.72x = 5,631.19 × 1,999.64
  4. Step 4: Simplify right side
    3,755.72x = 11,260,319.62
  5. Step 5: Solve for x
    x = 11,260,319.62/3,755.72
  6. Step 6: Final answer
    x = 2,998.18

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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.