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Finding the Third Proportional to 665.06 and 1,231.13

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Solution

The third proportional to 665.06 and 1,231.13 is: 2,278.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.06 : 1,231.13 = 1,231.13 : x
  2. Step 2: Convert to fraction form
    665.06/1,231.13 = 1,231.13/x
  3. Step 3: Cross multiply
    665.06x = 1,231.13 × 1,231.13
  4. Step 4: Simplify right side
    665.06x = 1,515,668.77
  5. Step 5: Solve for x
    x = 1,515,668.77/665.06
  6. Step 6: Final answer
    x = 2,278.99

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Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.