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Finding the Third Proportional to 611.75 and 922.38

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Solution

The third proportional to 611.75 and 922.38 is: 1,390.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.75 : 922.38 = 922.38 : x
  2. Step 2: Convert to fraction form
    611.75/922.38 = 922.38/x
  3. Step 3: Cross multiply
    611.75x = 922.38 × 922.38
  4. Step 4: Simplify right side
    611.75x = 850,775.64
  5. Step 5: Solve for x
    x = 850,775.64/611.75
  6. Step 6: Final answer
    x = 1,390.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.