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Finding the Fourth Proportional to 2,991.52, 4,487.24 and 939.52

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Solution

The fourth proportional to 2,991.52, 4,487.24 and 939.52 is: 1,409.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.52 : 4,487.24 = 939.52 : x
  2. Step 2: Convert to fraction form
    2,991.52/4,487.24 = 939.52/x
  3. Step 3: Cross multiply
    2,991.52x = 4,487.24 × 939.52
  4. Step 4: Simplify right side
    2,991.52x = 4,215,851.72
  5. Step 5: Solve for x
    x = 4,215,851.72/2,991.52
  6. Step 6: Final answer
    x = 1,409.27

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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.