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Finding the Third Proportional to 321,664 and 473,138

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Solution

The third proportional to 321,664 and 473,138 is: 695,942.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,664 : 473,138 = 473,138 : x
  2. Step 2: Convert to fraction form
    321,664/473,138 = 473,138/x
  3. Step 3: Cross multiply
    321,664x = 473,138 × 473,138
  4. Step 4: Simplify right side
    321,664x = 223,859,567,044
  5. Step 5: Solve for x
    x = 223,859,567,044/321,664
  6. Step 6: Final answer
    x = 695,942.25

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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.