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Finding the Fourth Proportional to 1,067.90, 1,473.75 and 713.20

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Solution

The fourth proportional to 1,067.90, 1,473.75 and 713.20 is: 984.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.90 : 1,473.75 = 713.20 : x
  2. Step 2: Convert to fraction form
    1,067.90/1,473.75 = 713.20/x
  3. Step 3: Cross multiply
    1,067.90x = 1,473.75 × 713.20
  4. Step 4: Simplify right side
    1,067.90x = 1,051,078.50
  5. Step 5: Solve for x
    x = 1,051,078.50/1,067.90
  6. Step 6: Final answer
    x = 984.25

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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.