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Finding the Third Proportional to 261,696 and 392,868

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Solution

The third proportional to 261,696 and 392,868 is: 589,788.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,696 : 392,868 = 392,868 : x
  2. Step 2: Convert to fraction form
    261,696/392,868 = 392,868/x
  3. Step 3: Cross multiply
    261,696x = 392,868 × 392,868
  4. Step 4: Simplify right side
    261,696x = 154,345,265,424
  5. Step 5: Solve for x
    x = 154,345,265,424/261,696
  6. Step 6: Final answer
    x = 589,788.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.