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Finding the Third Proportional to 310,720 and 680,726

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Solution

The third proportional to 310,720 and 680,726 is: 1,491,335.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,720 : 680,726 = 680,726 : x
  2. Step 2: Convert to fraction form
    310,720/680,726 = 680,726/x
  3. Step 3: Cross multiply
    310,720x = 680,726 × 680,726
  4. Step 4: Simplify right side
    310,720x = 463,387,887,076
  5. Step 5: Solve for x
    x = 463,387,887,076/310,720
  6. Step 6: Final answer
    x = 1,491,335.89

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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.