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Finding the Third Proportional to 276,426 and 423,375

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Solution

The third proportional to 276,426 and 423,375 is: 648,442.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,426 : 423,375 = 423,375 : x
  2. Step 2: Convert to fraction form
    276,426/423,375 = 423,375/x
  3. Step 3: Cross multiply
    276,426x = 423,375 × 423,375
  4. Step 4: Simplify right side
    276,426x = 179,246,390,625
  5. Step 5: Solve for x
    x = 179,246,390,625/276,426
  6. Step 6: Final answer
    x = 648,442.59

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.