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Finding the Third Proportional to 323,397 and 687,618

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Solution

The third proportional to 323,397 and 687,618 is: 1,462,037.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,397 : 687,618 = 687,618 : x
  2. Step 2: Convert to fraction form
    323,397/687,618 = 687,618/x
  3. Step 3: Cross multiply
    323,397x = 687,618 × 687,618
  4. Step 4: Simplify right side
    323,397x = 472,818,513,924
  5. Step 5: Solve for x
    x = 472,818,513,924/323,397
  6. Step 6: Final answer
    x = 1,462,037.42

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.