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Finding the Third Proportional to 149,906 and 316,540

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Solution

The third proportional to 149,906 and 316,540 is: 668,402.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,906 : 316,540 = 316,540 : x
  2. Step 2: Convert to fraction form
    149,906/316,540 = 316,540/x
  3. Step 3: Cross multiply
    149,906x = 316,540 × 316,540
  4. Step 4: Simplify right side
    149,906x = 100,197,571,600
  5. Step 5: Solve for x
    x = 100,197,571,600/149,906
  6. Step 6: Final answer
    x = 668,402.68

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.