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Finding the Fourth Proportional to 1,198.48, 1,653.98 and 667.44

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Solution

The fourth proportional to 1,198.48, 1,653.98 and 667.44 is: 921.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.48 : 1,653.98 = 667.44 : x
  2. Step 2: Convert to fraction form
    1,198.48/1,653.98 = 667.44/x
  3. Step 3: Cross multiply
    1,198.48x = 1,653.98 × 667.44
  4. Step 4: Simplify right side
    1,198.48x = 1,103,932.41
  5. Step 5: Solve for x
    x = 1,103,932.41/1,198.48
  6. Step 6: Final answer
    x = 921.11

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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.