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Finding the Third Proportional to 436,319 and 640,110

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Solution

The third proportional to 436,319 and 640,110 is: 939,085.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,319 : 640,110 = 640,110 : x
  2. Step 2: Convert to fraction form
    436,319/640,110 = 640,110/x
  3. Step 3: Cross multiply
    436,319x = 640,110 × 640,110
  4. Step 4: Simplify right side
    436,319x = 409,740,812,100
  5. Step 5: Solve for x
    x = 409,740,812,100/436,319
  6. Step 6: Final answer
    x = 939,085.42

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.