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Finding the Fourth Proportional to 1,067.79, 1,474.28 and 669.62

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Solution

The fourth proportional to 1,067.79, 1,474.28 and 669.62 is: 924.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.79 : 1,474.28 = 669.62 : x
  2. Step 2: Convert to fraction form
    1,067.79/1,474.28 = 669.62/x
  3. Step 3: Cross multiply
    1,067.79x = 1,474.28 × 669.62
  4. Step 4: Simplify right side
    1,067.79x = 987,196.65
  5. Step 5: Solve for x
    x = 987,196.65/1,067.79
  6. Step 6: Final answer
    x = 924.52

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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.