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Finding the Third Proportional to 292,914 and 639,540

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Solution

The third proportional to 292,914 and 639,540 is: 1,396,353.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,914 : 639,540 = 639,540 : x
  2. Step 2: Convert to fraction form
    292,914/639,540 = 639,540/x
  3. Step 3: Cross multiply
    292,914x = 639,540 × 639,540
  4. Step 4: Simplify right side
    292,914x = 409,011,411,600
  5. Step 5: Solve for x
    x = 409,011,411,600/292,914
  6. Step 6: Final answer
    x = 1,396,353.24

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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.