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Finding the Third Proportional to 295,311 and 642,318

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Solution

The third proportional to 295,311 and 642,318 is: 1,397,077.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,311 : 642,318 = 642,318 : x
  2. Step 2: Convert to fraction form
    295,311/642,318 = 642,318/x
  3. Step 3: Cross multiply
    295,311x = 642,318 × 642,318
  4. Step 4: Simplify right side
    295,311x = 412,572,413,124
  5. Step 5: Solve for x
    x = 412,572,413,124/295,311
  6. Step 6: Final answer
    x = 1,397,077.70

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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.