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Finding the Third Proportional to 138,619.50 and 302,115

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Solution

The third proportional to 138,619.50 and 302,115 is: 658,446.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,619.50 : 302,115 = 302,115 : x
  2. Step 2: Convert to fraction form
    138,619.50/302,115 = 302,115/x
  3. Step 3: Cross multiply
    138,619.50x = 302,115 × 302,115
  4. Step 4: Simplify right side
    138,619.50x = 91,273,473,225
  5. Step 5: Solve for x
    x = 91,273,473,225/138,619.50
  6. Step 6: Final answer
    x = 658,446.13

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.