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Finding the Fourth Proportional to 814.10, 1,213.41 and 767.97

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Solution

The fourth proportional to 814.10, 1,213.41 and 767.97 is: 1,144.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.10 : 1,213.41 = 767.97 : x
  2. Step 2: Convert to fraction form
    814.10/1,213.41 = 767.97/x
  3. Step 3: Cross multiply
    814.10x = 1,213.41 × 767.97
  4. Step 4: Simplify right side
    814.10x = 931,862.48
  5. Step 5: Solve for x
    x = 931,862.48/814.10
  6. Step 6: Final answer
    x = 1,144.65

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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.