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Finding the Fourth Proportional to 1,111.97, 1,668.50 and 746.04

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Solution

The fourth proportional to 1,111.97, 1,668.50 and 746.04 is: 1,119.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.97 : 1,668.50 = 746.04 : x
  2. Step 2: Convert to fraction form
    1,111.97/1,668.50 = 746.04/x
  3. Step 3: Cross multiply
    1,111.97x = 1,668.50 × 746.04
  4. Step 4: Simplify right side
    1,111.97x = 1,244,757.75
  5. Step 5: Solve for x
    x = 1,244,757.75/1,111.97
  6. Step 6: Final answer
    x = 1,119.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.