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Finding the Fourth Proportional to 3,998.87, 5,518.34 and 2,320.43

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Solution

The fourth proportional to 3,998.87, 5,518.34 and 2,320.43 is: 3,202.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.87 : 5,518.34 = 2,320.43 : x
  2. Step 2: Convert to fraction form
    3,998.87/5,518.34 = 2,320.43/x
  3. Step 3: Cross multiply
    3,998.87x = 5,518.34 × 2,320.43
  4. Step 4: Simplify right side
    3,998.87x = 12,804,921.69
  5. Step 5: Solve for x
    x = 12,804,921.69/3,998.87
  6. Step 6: Final answer
    x = 3,202.14

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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.