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Finding the Third Proportional to 299,280 and 640,068

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Solution

The third proportional to 299,280 and 640,068 is: 1,368,908.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,280 : 640,068 = 640,068 : x
  2. Step 2: Convert to fraction form
    299,280/640,068 = 640,068/x
  3. Step 3: Cross multiply
    299,280x = 640,068 × 640,068
  4. Step 4: Simplify right side
    299,280x = 409,687,044,624
  5. Step 5: Solve for x
    x = 409,687,044,624/299,280
  6. Step 6: Final answer
    x = 1,368,908.86

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.