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Finding the Third Proportional to 642,042 and 1,391,078.25

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Solution

The third proportional to 642,042 and 1,391,078.25 is: 3,013,975.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,042 : 1,391,078.25 = 1,391,078.25 : x
  2. Step 2: Convert to fraction form
    642,042/1,391,078.25 = 1,391,078.25/x
  3. Step 3: Cross multiply
    642,042x = 1,391,078.25 × 1,391,078.25
  4. Step 4: Simplify right side
    642,042x = 1,935,098,697,623.06
  5. Step 5: Solve for x
    x = 1,935,098,697,623.06/642,042
  6. Step 6: Final answer
    x = 3,013,975.25

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.