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Finding the Third Proportional to 261,913.50 and 405,694.13

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Solution

The third proportional to 261,913.50 and 405,694.13 is: 628,404.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,913.50 : 405,694.13 = 405,694.13 : x
  2. Step 2: Convert to fraction form
    261,913.50/405,694.13 = 405,694.13/x
  3. Step 3: Cross multiply
    261,913.50x = 405,694.13 × 405,694.13
  4. Step 4: Simplify right side
    261,913.50x = 164,587,723,059.52
  5. Step 5: Solve for x
    x = 164,587,723,059.52/261,913.50
  6. Step 6: Final answer
    x = 628,404.89

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.