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Finding the Third Proportional to 720.77 and 996.05

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Solution

The third proportional to 720.77 and 996.05 is: 1,376.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.77 : 996.05 = 996.05 : x
  2. Step 2: Convert to fraction form
    720.77/996.05 = 996.05/x
  3. Step 3: Cross multiply
    720.77x = 996.05 × 996.05
  4. Step 4: Simplify right side
    720.77x = 992,109.38
  5. Step 5: Solve for x
    x = 992,109.38/720.77
  6. Step 6: Final answer
    x = 1,376.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.