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Finding the Fourth Proportional to 1,067.15, 1,471.41 and 731.22

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Solution

The fourth proportional to 1,067.15, 1,471.41 and 731.22 is: 1,008.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.15 : 1,471.41 = 731.22 : x
  2. Step 2: Convert to fraction form
    1,067.15/1,471.41 = 731.22/x
  3. Step 3: Cross multiply
    1,067.15x = 1,471.41 × 731.22
  4. Step 4: Simplify right side
    1,067.15x = 1,075,924.42
  5. Step 5: Solve for x
    x = 1,075,924.42/1,067.15
  6. Step 6: Final answer
    x = 1,008.22

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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.