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Finding the Third Proportional to 320,313 and 491,328

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Solution

The third proportional to 320,313 and 491,328 is: 753,647.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,313 : 491,328 = 491,328 : x
  2. Step 2: Convert to fraction form
    320,313/491,328 = 491,328/x
  3. Step 3: Cross multiply
    320,313x = 491,328 × 491,328
  4. Step 4: Simplify right side
    320,313x = 241,403,203,584
  5. Step 5: Solve for x
    x = 241,403,203,584/320,313
  6. Step 6: Final answer
    x = 753,647.85

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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.