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Finding the Third Proportional to 135,192 and 312,961

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Solution

The third proportional to 135,192 and 312,961 is: 724,485.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,192 : 312,961 = 312,961 : x
  2. Step 2: Convert to fraction form
    135,192/312,961 = 312,961/x
  3. Step 3: Cross multiply
    135,192x = 312,961 × 312,961
  4. Step 4: Simplify right side
    135,192x = 97,944,587,521
  5. Step 5: Solve for x
    x = 97,944,587,521/135,192
  6. Step 6: Final answer
    x = 724,485.08

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.