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Finding the Third Proportional to 397,328 and 865,585

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Solution

The third proportional to 397,328 and 865,585 is: 1,885,689.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,328 : 865,585 = 865,585 : x
  2. Step 2: Convert to fraction form
    397,328/865,585 = 865,585/x
  3. Step 3: Cross multiply
    397,328x = 865,585 × 865,585
  4. Step 4: Simplify right side
    397,328x = 749,237,392,225
  5. Step 5: Solve for x
    x = 749,237,392,225/397,328
  6. Step 6: Final answer
    x = 1,885,689.89

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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.