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Finding the Fourth Proportional to 1,393.87, 1,922.85 and 833.96

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Solution

The fourth proportional to 1,393.87, 1,922.85 and 833.96 is: 1,150.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.87 : 1,922.85 = 833.96 : x
  2. Step 2: Convert to fraction form
    1,393.87/1,922.85 = 833.96/x
  3. Step 3: Cross multiply
    1,393.87x = 1,922.85 × 833.96
  4. Step 4: Simplify right side
    1,393.87x = 1,603,590.02
  5. Step 5: Solve for x
    x = 1,603,590.02/1,393.87
  6. Step 6: Final answer
    x = 1,150.46

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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.