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Finding the Fourth Proportional to 1,067.89, 1,473.64 and 788.02

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Solution

The fourth proportional to 1,067.89, 1,473.64 and 788.02 is: 1,087.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.89 : 1,473.64 = 788.02 : x
  2. Step 2: Convert to fraction form
    1,067.89/1,473.64 = 788.02/x
  3. Step 3: Cross multiply
    1,067.89x = 1,473.64 × 788.02
  4. Step 4: Simplify right side
    1,067.89x = 1,161,255.82
  5. Step 5: Solve for x
    x = 1,161,255.82/1,067.89
  6. Step 6: Final answer
    x = 1,087.43

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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.