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Finding the Third Proportional to 316.13 and 779.63

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Solution

The third proportional to 316.13 and 779.63 is: 1,922.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.13 : 779.63 = 779.63 : x
  2. Step 2: Convert to fraction form
    316.13/779.63 = 779.63/x
  3. Step 3: Cross multiply
    316.13x = 779.63 × 779.63
  4. Step 4: Simplify right side
    316.13x = 607,815.14
  5. Step 5: Solve for x
    x = 607,815.14/316.13
  6. Step 6: Final answer
    x = 1,922.71

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Why These Related Problems?

These problems maintain the same ratio (2.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.