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Finding the Third Proportional to 739.88 and 986.81

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Solution

The third proportional to 739.88 and 986.81 is: 1,316.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.88 : 986.81 = 986.81 : x
  2. Step 2: Convert to fraction form
    739.88/986.81 = 986.81/x
  3. Step 3: Cross multiply
    739.88x = 986.81 × 986.81
  4. Step 4: Simplify right side
    739.88x = 973,798.91
  5. Step 5: Solve for x
    x = 973,798.91/739.88
  6. Step 6: Final answer
    x = 1,316.17

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.