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Finding the Third Proportional to 253,315 and 395,309

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Solution

The third proportional to 253,315 and 395,309 is: 616,896.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,315 : 395,309 = 395,309 : x
  2. Step 2: Convert to fraction form
    253,315/395,309 = 395,309/x
  3. Step 3: Cross multiply
    253,315x = 395,309 × 395,309
  4. Step 4: Simplify right side
    253,315x = 156,269,205,481
  5. Step 5: Solve for x
    x = 156,269,205,481/253,315
  6. Step 6: Final answer
    x = 616,896.77

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.