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Finding the Third Proportional to 217,487,218.50 and 329,389,611.75

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Solution

The third proportional to 217,487,218.50 and 329,389,611.75 is: 498,868,471.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,487,218.50 : 329,389,611.75 = 329,389,611.75 : x
  2. Step 2: Convert to fraction form
    217,487,218.50/329,389,611.75 = 329,389,611.75/x
  3. Step 3: Cross multiply
    217,487,218.50x = 329,389,611.75 × 329,389,611.75
  4. Step 4: Simplify right side
    217,487,218.50x = 108,497,516,328,815,744
  5. Step 5: Solve for x
    x = 108,497,516,328,815,744/217,487,218.50
  6. Step 6: Final answer
    x = 498,868,471.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.