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Finding the Fourth Proportional to 3,999.28, 5,999.56 and 1,807.92

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Solution

The fourth proportional to 3,999.28, 5,999.56 and 1,807.92 is: 2,712.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.28 : 5,999.56 = 1,807.92 : x
  2. Step 2: Convert to fraction form
    3,999.28/5,999.56 = 1,807.92/x
  3. Step 3: Cross multiply
    3,999.28x = 5,999.56 × 1,807.92
  4. Step 4: Simplify right side
    3,999.28x = 10,846,724.52
  5. Step 5: Solve for x
    x = 10,846,724.52/3,999.28
  6. Step 6: Final answer
    x = 2,712.17

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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.