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Finding the Third Proportional to 321,728 and 473,226

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Solution

The third proportional to 321,728 and 473,226 is: 696,062.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,728 : 473,226 = 473,226 : x
  2. Step 2: Convert to fraction form
    321,728/473,226 = 473,226/x
  3. Step 3: Cross multiply
    321,728x = 473,226 × 473,226
  4. Step 4: Simplify right side
    321,728x = 223,942,847,076
  5. Step 5: Solve for x
    x = 223,942,847,076/321,728
  6. Step 6: Final answer
    x = 696,062.66

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.