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Finding the Third Proportional to 201,928 and 312,628

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Solution

The third proportional to 201,928 and 312,628 is: 484,015.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,928 : 312,628 = 312,628 : x
  2. Step 2: Convert to fraction form
    201,928/312,628 = 312,628/x
  3. Step 3: Cross multiply
    201,928x = 312,628 × 312,628
  4. Step 4: Simplify right side
    201,928x = 97,736,266,384
  5. Step 5: Solve for x
    x = 97,736,266,384/201,928
  6. Step 6: Final answer
    x = 484,015.42

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.