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Finding the Third Proportional to 122.63 and 259.59

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Solution

The third proportional to 122.63 and 259.59 is: 549.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.63 : 259.59 = 259.59 : x
  2. Step 2: Convert to fraction form
    122.63/259.59 = 259.59/x
  3. Step 3: Cross multiply
    122.63x = 259.59 × 259.59
  4. Step 4: Simplify right side
    122.63x = 67,388.92
  5. Step 5: Solve for x
    x = 67,388.92/122.63
  6. Step 6: Final answer
    x = 549.55

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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.