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Finding the Fourth Proportional to 1,107.17, 1,661.97 and 942.08

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Solution

The fourth proportional to 1,107.17, 1,661.97 and 942.08 is: 1,414.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.17 : 1,661.97 = 942.08 : x
  2. Step 2: Convert to fraction form
    1,107.17/1,661.97 = 942.08/x
  3. Step 3: Cross multiply
    1,107.17x = 1,661.97 × 942.08
  4. Step 4: Simplify right side
    1,107.17x = 1,565,707.97
  5. Step 5: Solve for x
    x = 1,565,707.97/1,107.17
  6. Step 6: Final answer
    x = 1,414.15

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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.