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Finding the Third Proportional to 261,842 and 400,379

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Solution

The third proportional to 261,842 and 400,379 is: 612,214.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,842 : 400,379 = 400,379 : x
  2. Step 2: Convert to fraction form
    261,842/400,379 = 400,379/x
  3. Step 3: Cross multiply
    261,842x = 400,379 × 400,379
  4. Step 4: Simplify right side
    261,842x = 160,303,343,641
  5. Step 5: Solve for x
    x = 160,303,343,641/261,842
  6. Step 6: Final answer
    x = 612,214.02

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.