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Finding the Third Proportional to 198,309.38 and 289,157.63

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Solution

The third proportional to 198,309.38 and 289,157.63 is: 421,624.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,309.38 : 289,157.63 = 289,157.63 : x
  2. Step 2: Convert to fraction form
    198,309.38/289,157.63 = 289,157.63/x
  3. Step 3: Cross multiply
    198,309.38x = 289,157.63 × 289,157.63
  4. Step 4: Simplify right side
    198,309.38x = 83,612,132,095.64
  5. Step 5: Solve for x
    x = 83,612,132,095.64/198,309.38
  6. Step 6: Final answer
    x = 421,624.71

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.