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Finding the Third Proportional to 202,972 and 315,501

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Solution

The third proportional to 202,972 and 315,501 is: 490,416.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,972 : 315,501 = 315,501 : x
  2. Step 2: Convert to fraction form
    202,972/315,501 = 315,501/x
  3. Step 3: Cross multiply
    202,972x = 315,501 × 315,501
  4. Step 4: Simplify right side
    202,972x = 99,540,881,001
  5. Step 5: Solve for x
    x = 99,540,881,001/202,972
  6. Step 6: Final answer
    x = 490,416.81

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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.