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Finding the Third Proportional to 122,840 and 260,442

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Solution

The third proportional to 122,840 and 260,442 is: 552,181.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,840 : 260,442 = 260,442 : x
  2. Step 2: Convert to fraction form
    122,840/260,442 = 260,442/x
  3. Step 3: Cross multiply
    122,840x = 260,442 × 260,442
  4. Step 4: Simplify right side
    122,840x = 67,830,035,364
  5. Step 5: Solve for x
    x = 67,830,035,364/122,840
  6. Step 6: Final answer
    x = 552,181.99

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.