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Finding the Third Proportional to 641.67 and 1,192.22

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Solution

The third proportional to 641.67 and 1,192.22 is: 2,215.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.67 : 1,192.22 = 1,192.22 : x
  2. Step 2: Convert to fraction form
    641.67/1,192.22 = 1,192.22/x
  3. Step 3: Cross multiply
    641.67x = 1,192.22 × 1,192.22
  4. Step 4: Simplify right side
    641.67x = 1,421,385.55
  5. Step 5: Solve for x
    x = 1,421,385.55/641.67
  6. Step 6: Final answer
    x = 2,215.13

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Why These Related Problems?

These problems maintain the same ratio (1.86) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.