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Finding the Third Proportional to 138,309 and 281,688

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Solution

The third proportional to 138,309 and 281,688 is: 573,701.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,309 : 281,688 = 281,688 : x
  2. Step 2: Convert to fraction form
    138,309/281,688 = 281,688/x
  3. Step 3: Cross multiply
    138,309x = 281,688 × 281,688
  4. Step 4: Simplify right side
    138,309x = 79,348,129,344
  5. Step 5: Solve for x
    x = 79,348,129,344/138,309
  6. Step 6: Final answer
    x = 573,701.85

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.