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Finding the Third Proportional to 314,464 and 678,743

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Solution

The third proportional to 314,464 and 678,743 is: 1,465,007.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,464 : 678,743 = 678,743 : x
  2. Step 2: Convert to fraction form
    314,464/678,743 = 678,743/x
  3. Step 3: Cross multiply
    314,464x = 678,743 × 678,743
  4. Step 4: Simplify right side
    314,464x = 460,692,060,049
  5. Step 5: Solve for x
    x = 460,692,060,049/314,464
  6. Step 6: Final answer
    x = 1,465,007.31

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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.