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Finding the Third Proportional to 310,284 and 640,494

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Solution

The third proportional to 310,284 and 640,494 is: 1,322,119.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,284 : 640,494 = 640,494 : x
  2. Step 2: Convert to fraction form
    310,284/640,494 = 640,494/x
  3. Step 3: Cross multiply
    310,284x = 640,494 × 640,494
  4. Step 4: Simplify right side
    310,284x = 410,232,564,036
  5. Step 5: Solve for x
    x = 410,232,564,036/310,284
  6. Step 6: Final answer
    x = 1,322,119.62

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.