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Finding the Fourth Proportional to 3,998.45, 5,512.96 and 3,287.81

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Solution

The fourth proportional to 3,998.45, 5,512.96 and 3,287.81 is: 4,533.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.45 : 5,512.96 = 3,287.81 : x
  2. Step 2: Convert to fraction form
    3,998.45/5,512.96 = 3,287.81/x
  3. Step 3: Cross multiply
    3,998.45x = 5,512.96 × 3,287.81
  4. Step 4: Simplify right side
    3,998.45x = 18,125,582.91
  5. Step 5: Solve for x
    x = 18,125,582.91/3,998.45
  6. Step 6: Final answer
    x = 4,533.15

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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.