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Finding the Fourth Proportional to 773.72, 1,067.96 and 511.80

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Solution

The fourth proportional to 773.72, 1,067.96 and 511.80 is: 706.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.72 : 1,067.96 = 511.80 : x
  2. Step 2: Convert to fraction form
    773.72/1,067.96 = 511.80/x
  3. Step 3: Cross multiply
    773.72x = 1,067.96 × 511.80
  4. Step 4: Simplify right side
    773.72x = 546,581.93
  5. Step 5: Solve for x
    x = 546,581.93/773.72
  6. Step 6: Final answer
    x = 706.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.