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Finding the Fourth Proportional to 1,067.82, 1,474.90 and 772.62

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Solution

The fourth proportional to 1,067.82, 1,474.90 and 772.62 is: 1,067.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.82 : 1,474.90 = 772.62 : x
  2. Step 2: Convert to fraction form
    1,067.82/1,474.90 = 772.62/x
  3. Step 3: Cross multiply
    1,067.82x = 1,474.90 × 772.62
  4. Step 4: Simplify right side
    1,067.82x = 1,139,537.24
  5. Step 5: Solve for x
    x = 1,139,537.24/1,067.82
  6. Step 6: Final answer
    x = 1,067.16

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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.