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Finding the Third Proportional to 122,915 and 268,078

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Solution

The third proportional to 122,915 and 268,078 is: 584,678.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,915 : 268,078 = 268,078 : x
  2. Step 2: Convert to fraction form
    122,915/268,078 = 268,078/x
  3. Step 3: Cross multiply
    122,915x = 268,078 × 268,078
  4. Step 4: Simplify right side
    122,915x = 71,865,814,084
  5. Step 5: Solve for x
    x = 71,865,814,084/122,915
  6. Step 6: Final answer
    x = 584,678.96

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.