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Finding the Fourth Proportional to 3,991.71, 5,508.71 and 2,199.39

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Solution

The fourth proportional to 3,991.71, 5,508.71 and 2,199.39 is: 3,035.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.71 : 5,508.71 = 2,199.39 : x
  2. Step 2: Convert to fraction form
    3,991.71/5,508.71 = 2,199.39/x
  3. Step 3: Cross multiply
    3,991.71x = 5,508.71 × 2,199.39
  4. Step 4: Simplify right side
    3,991.71x = 12,115,790.69
  5. Step 5: Solve for x
    x = 12,115,790.69/3,991.71
  6. Step 6: Final answer
    x = 3,035.24

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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.