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Finding the Fourth Proportional to 3,991.92, 5,989.78 and 1,801.32

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Solution

The fourth proportional to 3,991.92, 5,989.78 and 1,801.32 is: 2,702.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.92 : 5,989.78 = 1,801.32 : x
  2. Step 2: Convert to fraction form
    3,991.92/5,989.78 = 1,801.32/x
  3. Step 3: Cross multiply
    3,991.92x = 5,989.78 × 1,801.32
  4. Step 4: Simplify right side
    3,991.92x = 10,789,510.51
  5. Step 5: Solve for x
    x = 10,789,510.51/3,991.92
  6. Step 6: Final answer
    x = 2,702.84

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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.