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Finding the Third Proportional to 665.30 and 1,461.80

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Solution

The third proportional to 665.30 and 1,461.80 is: 3,211.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.30 : 1,461.80 = 1,461.80 : x
  2. Step 2: Convert to fraction form
    665.30/1,461.80 = 1,461.80/x
  3. Step 3: Cross multiply
    665.30x = 1,461.80 × 1,461.80
  4. Step 4: Simplify right side
    665.30x = 2,136,850.10
  5. Step 5: Solve for x
    x = 2,136,850.10/665.30
  6. Step 6: Final answer
    x = 3,211.87

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.