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Finding the Third Proportional to 991.13 and 2,161.13

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Solution

The third proportional to 991.13 and 2,161.13 is: 4,712.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    991.13 : 2,161.13 = 2,161.13 : x
  2. Step 2: Convert to fraction form
    991.13/2,161.13 = 2,161.13/x
  3. Step 3: Cross multiply
    991.13x = 2,161.13 × 2,161.13
  4. Step 4: Simplify right side
    991.13x = 4,670,461.27
  5. Step 5: Solve for x
    x = 4,670,461.27/991.13
  6. Step 6: Final answer
    x = 4,712.28

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.