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Finding the Third Proportional to 276,220 and 426,540

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Solution

The third proportional to 276,220 and 426,540 is: 658,664.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,220 : 426,540 = 426,540 : x
  2. Step 2: Convert to fraction form
    276,220/426,540 = 426,540/x
  3. Step 3: Cross multiply
    276,220x = 426,540 × 426,540
  4. Step 4: Simplify right side
    276,220x = 181,936,371,600
  5. Step 5: Solve for x
    x = 181,936,371,600/276,220
  6. Step 6: Final answer
    x = 658,664.73

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.