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Finding the Third Proportional to 310,928 and 669,420

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Solution

The third proportional to 310,928 and 669,420 is: 1,441,244.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,928 : 669,420 = 669,420 : x
  2. Step 2: Convert to fraction form
    310,928/669,420 = 669,420/x
  3. Step 3: Cross multiply
    310,928x = 669,420 × 669,420
  4. Step 4: Simplify right side
    310,928x = 448,123,136,400
  5. Step 5: Solve for x
    x = 448,123,136,400/310,928
  6. Step 6: Final answer
    x = 1,441,244.07

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.