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Finding the Fourth Proportional to 1,393.22, 1,922.58 and 834

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Solution

The fourth proportional to 1,393.22, 1,922.58 and 834 is: 1,150.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.22 : 1,922.58 = 834 : x
  2. Step 2: Convert to fraction form
    1,393.22/1,922.58 = 834/x
  3. Step 3: Cross multiply
    1,393.22x = 1,922.58 × 834
  4. Step 4: Simplify right side
    1,393.22x = 1,603,431.72
  5. Step 5: Solve for x
    x = 1,603,431.72/1,393.22
  6. Step 6: Final answer
    x = 1,150.88

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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.