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Finding the Third Proportional to 815,129 and 1,791,609

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Solution

The third proportional to 815,129 and 1,791,609 is: 3,937,858.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,129 : 1,791,609 = 1,791,609 : x
  2. Step 2: Convert to fraction form
    815,129/1,791,609 = 1,791,609/x
  3. Step 3: Cross multiply
    815,129x = 1,791,609 × 1,791,609
  4. Step 4: Simplify right side
    815,129x = 3,209,862,808,881
  5. Step 5: Solve for x
    x = 3,209,862,808,881/815,129
  6. Step 6: Final answer
    x = 3,937,858.68

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.