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Finding the Fourth Proportional to 2,991.03, 4,487.10 and 911.22

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Solution

The fourth proportional to 2,991.03, 4,487.10 and 911.22 is: 1,367.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.03 : 4,487.10 = 911.22 : x
  2. Step 2: Convert to fraction form
    2,991.03/4,487.10 = 911.22/x
  3. Step 3: Cross multiply
    2,991.03x = 4,487.10 × 911.22
  4. Step 4: Simplify right side
    2,991.03x = 4,088,735.26
  5. Step 5: Solve for x
    x = 4,088,735.26/2,991.03
  6. Step 6: Final answer
    x = 1,367.00

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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.