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Finding the Third Proportional to 991,926 and 2,160,999

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Solution

The third proportional to 991,926 and 2,160,999 is: 4,707,928.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,926 : 2,160,999 = 2,160,999 : x
  2. Step 2: Convert to fraction form
    991,926/2,160,999 = 2,160,999/x
  3. Step 3: Cross multiply
    991,926x = 2,160,999 × 2,160,999
  4. Step 4: Simplify right side
    991,926x = 4,669,916,678,001
  5. Step 5: Solve for x
    x = 4,669,916,678,001/991,926
  6. Step 6: Final answer
    x = 4,707,928.49

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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.