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Finding the Fourth Proportional to 3,993.48, 5,991.30 and 1,528.20

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Solution

The fourth proportional to 3,993.48, 5,991.30 and 1,528.20 is: 2,292.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,993.48 : 5,991.30 = 1,528.20 : x
  2. Step 2: Convert to fraction form
    3,993.48/5,991.30 = 1,528.20/x
  3. Step 3: Cross multiply
    3,993.48x = 5,991.30 × 1,528.20
  4. Step 4: Simplify right side
    3,993.48x = 9,155,904.66
  5. Step 5: Solve for x
    x = 9,155,904.66/3,993.48
  6. Step 6: Final answer
    x = 2,292.71

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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.