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Finding the Third Proportional to 436,296 and 640,080

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Solution

The third proportional to 436,296 and 640,080 is: 939,046.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,296 : 640,080 = 640,080 : x
  2. Step 2: Convert to fraction form
    436,296/640,080 = 640,080/x
  3. Step 3: Cross multiply
    436,296x = 640,080 × 640,080
  4. Step 4: Simplify right side
    436,296x = 409,702,406,400
  5. Step 5: Solve for x
    x = 409,702,406,400/436,296
  6. Step 6: Final answer
    x = 939,046.90

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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.