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Finding the Third Proportional to 292,342 and 639,360

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Solution

The third proportional to 292,342 and 639,360 is: 1,398,297.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,342 : 639,360 = 639,360 : x
  2. Step 2: Convert to fraction form
    292,342/639,360 = 639,360/x
  3. Step 3: Cross multiply
    292,342x = 639,360 × 639,360
  4. Step 4: Simplify right side
    292,342x = 408,781,209,600
  5. Step 5: Solve for x
    x = 408,781,209,600/292,342
  6. Step 6: Final answer
    x = 1,398,297.92

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.