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Finding the Third Proportional to 261,636 and 392,454

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Solution

The third proportional to 261,636 and 392,454 is: 588,681

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,636 : 392,454 = 392,454 : x
  2. Step 2: Convert to fraction form
    261,636/392,454 = 392,454/x
  3. Step 3: Cross multiply
    261,636x = 392,454 × 392,454
  4. Step 4: Simplify right side
    261,636x = 154,020,142,116
  5. Step 5: Solve for x
    x = 154,020,142,116/261,636
  6. Step 6: Final answer
    x = 588,681

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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.