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Finding the Third Proportional to 122,220 and 261,288

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Solution

The third proportional to 122,220 and 261,288 is: 558,594.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,220 : 261,288 = 261,288 : x
  2. Step 2: Convert to fraction form
    122,220/261,288 = 261,288/x
  3. Step 3: Cross multiply
    122,220x = 261,288 × 261,288
  4. Step 4: Simplify right side
    122,220x = 68,271,418,944
  5. Step 5: Solve for x
    x = 68,271,418,944/122,220
  6. Step 6: Final answer
    x = 558,594.49

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.