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Finding the Fourth Proportional to 1,381.34, 1,906.22 and 760.34

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Solution

The fourth proportional to 1,381.34, 1,906.22 and 760.34 is: 1,049.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.34 : 1,906.22 = 760.34 : x
  2. Step 2: Convert to fraction form
    1,381.34/1,906.22 = 760.34/x
  3. Step 3: Cross multiply
    1,381.34x = 1,906.22 × 760.34
  4. Step 4: Simplify right side
    1,381.34x = 1,449,367.68
  5. Step 5: Solve for x
    x = 1,449,367.68/1,381.34
  6. Step 6: Final answer
    x = 1,049.25

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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.