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Finding the Third Proportional to 217,516 and 319,086

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Solution

The third proportional to 217,516 and 319,086 is: 468,084.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,516 : 319,086 = 319,086 : x
  2. Step 2: Convert to fraction form
    217,516/319,086 = 319,086/x
  3. Step 3: Cross multiply
    217,516x = 319,086 × 319,086
  4. Step 4: Simplify right side
    217,516x = 101,815,875,396
  5. Step 5: Solve for x
    x = 101,815,875,396/217,516
  6. Step 6: Final answer
    x = 468,084.53

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.