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Finding the Third Proportional to 139,413 and 305,508

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Solution

The third proportional to 139,413 and 305,508 is: 669,486.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,413 : 305,508 = 305,508 : x
  2. Step 2: Convert to fraction form
    139,413/305,508 = 305,508/x
  3. Step 3: Cross multiply
    139,413x = 305,508 × 305,508
  4. Step 4: Simplify right side
    139,413x = 93,335,138,064
  5. Step 5: Solve for x
    x = 93,335,138,064/139,413
  6. Step 6: Final answer
    x = 669,486.62

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.