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Finding the Fourth Proportional to 773.89, 1,067.95 and 479.11

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Solution

The fourth proportional to 773.89, 1,067.95 and 479.11 is: 661.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.89 : 1,067.95 = 479.11 : x
  2. Step 2: Convert to fraction form
    773.89/1,067.95 = 479.11/x
  3. Step 3: Cross multiply
    773.89x = 1,067.95 × 479.11
  4. Step 4: Simplify right side
    773.89x = 511,665.52
  5. Step 5: Solve for x
    x = 511,665.52/773.89
  6. Step 6: Final answer
    x = 661.16

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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.