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Finding the Third Proportional to 423,876 and 640,134

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Solution

The third proportional to 423,876 and 640,134 is: 966,725.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,876 : 640,134 = 640,134 : x
  2. Step 2: Convert to fraction form
    423,876/640,134 = 640,134/x
  3. Step 3: Cross multiply
    423,876x = 640,134 × 640,134
  4. Step 4: Simplify right side
    423,876x = 409,771,537,956
  5. Step 5: Solve for x
    x = 409,771,537,956/423,876
  6. Step 6: Final answer
    x = 966,725.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.