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Finding the Third Proportional to 310,740 and 676,838

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Solution

The third proportional to 310,740 and 676,838 is: 1,474,253.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,740 : 676,838 = 676,838 : x
  2. Step 2: Convert to fraction form
    310,740/676,838 = 676,838/x
  3. Step 3: Cross multiply
    310,740x = 676,838 × 676,838
  4. Step 4: Simplify right side
    310,740x = 458,109,678,244
  5. Step 5: Solve for x
    x = 458,109,678,244/310,740
  6. Step 6: Final answer
    x = 1,474,253.97

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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.