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Finding the Third Proportional to 814.22 and 1,215.84

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Solution

The third proportional to 814.22 and 1,215.84 is: 1,815.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.22 : 1,215.84 = 1,215.84 : x
  2. Step 2: Convert to fraction form
    814.22/1,215.84 = 1,215.84/x
  3. Step 3: Cross multiply
    814.22x = 1,215.84 × 1,215.84
  4. Step 4: Simplify right side
    814.22x = 1,478,276.02
  5. Step 5: Solve for x
    x = 1,478,276.02/814.22
  6. Step 6: Final answer
    x = 1,815.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.