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Finding the Third Proportional to 276,590 and 417,429

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Solution

The third proportional to 276,590 and 417,429 is: 629,982.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,590 : 417,429 = 417,429 : x
  2. Step 2: Convert to fraction form
    276,590/417,429 = 417,429/x
  3. Step 3: Cross multiply
    276,590x = 417,429 × 417,429
  4. Step 4: Simplify right side
    276,590x = 174,246,970,041
  5. Step 5: Solve for x
    x = 174,246,970,041/276,590
  6. Step 6: Final answer
    x = 629,982.90

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.