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Finding the Third Proportional to 387,720 and 837,720

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Solution

The third proportional to 387,720 and 837,720 is: 1,810,004.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,720 : 837,720 = 837,720 : x
  2. Step 2: Convert to fraction form
    387,720/837,720 = 837,720/x
  3. Step 3: Cross multiply
    387,720x = 837,720 × 837,720
  4. Step 4: Simplify right side
    387,720x = 701,774,798,400
  5. Step 5: Solve for x
    x = 701,774,798,400/387,720
  6. Step 6: Final answer
    x = 1,810,004.12

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.