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Finding the Third Proportional to 736.13 and 991.31

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Solution

The third proportional to 736.13 and 991.31 is: 1,334.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.13 : 991.31 = 991.31 : x
  2. Step 2: Convert to fraction form
    736.13/991.31 = 991.31/x
  3. Step 3: Cross multiply
    736.13x = 991.31 × 991.31
  4. Step 4: Simplify right side
    736.13x = 982,700.47
  5. Step 5: Solve for x
    x = 982,700.47/736.13
  6. Step 6: Final answer
    x = 1,334.96

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.