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Finding the Fourth Proportional to 773.52, 1,067 and 478.28

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Solution

The fourth proportional to 773.52, 1,067 and 478.28 is: 659.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.52 : 1,067 = 478.28 : x
  2. Step 2: Convert to fraction form
    773.52/1,067 = 478.28/x
  3. Step 3: Cross multiply
    773.52x = 1,067 × 478.28
  4. Step 4: Simplify right side
    773.52x = 510,324.76
  5. Step 5: Solve for x
    x = 510,324.76/773.52
  6. Step 6: Final answer
    x = 659.74

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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.