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Finding the Third Proportional to 721.38 and 1,112.63

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Solution

The third proportional to 721.38 and 1,112.63 is: 1,716.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.38 : 1,112.63 = 1,112.63 : x
  2. Step 2: Convert to fraction form
    721.38/1,112.63 = 1,112.63/x
  3. Step 3: Cross multiply
    721.38x = 1,112.63 × 1,112.63
  4. Step 4: Simplify right side
    721.38x = 1,237,934.39
  5. Step 5: Solve for x
    x = 1,237,934.39/721.38
  6. Step 6: Final answer
    x = 1,716.08

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.