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Finding the Fourth Proportional to 3,998.39, 5,517.76 and 2,320.77

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Solution

The fourth proportional to 3,998.39, 5,517.76 and 2,320.77 is: 3,202.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.39 : 5,517.76 = 2,320.77 : x
  2. Step 2: Convert to fraction form
    3,998.39/5,517.76 = 2,320.77/x
  3. Step 3: Cross multiply
    3,998.39x = 5,517.76 × 2,320.77
  4. Step 4: Simplify right side
    3,998.39x = 12,805,440.27
  5. Step 5: Solve for x
    x = 12,805,440.27/3,998.39
  6. Step 6: Final answer
    x = 3,202.65

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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.