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Finding the Fourth Proportional to 773.83, 1,067.91 and 553.31

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Solution

The fourth proportional to 773.83, 1,067.91 and 553.31 is: 763.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.83 : 1,067.91 = 553.31 : x
  2. Step 2: Convert to fraction form
    773.83/1,067.91 = 553.31/x
  3. Step 3: Cross multiply
    773.83x = 1,067.91 × 553.31
  4. Step 4: Simplify right side
    773.83x = 590,886.02
  5. Step 5: Solve for x
    x = 590,886.02/773.83
  6. Step 6: Final answer
    x = 763.59

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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.