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Finding the Fourth Proportional to 1,104.97, 1,523.43 and 905.06

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Solution

The fourth proportional to 1,104.97, 1,523.43 and 905.06 is: 1,247.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.97 : 1,523.43 = 905.06 : x
  2. Step 2: Convert to fraction form
    1,104.97/1,523.43 = 905.06/x
  3. Step 3: Cross multiply
    1,104.97x = 1,523.43 × 905.06
  4. Step 4: Simplify right side
    1,104.97x = 1,378,799.77
  5. Step 5: Solve for x
    x = 1,378,799.77/1,104.97
  6. Step 6: Final answer
    x = 1,247.82

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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.