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Finding the Fourth Proportional to 833.05, 1,249.52 and 285.22

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Solution

The fourth proportional to 833.05, 1,249.52 and 285.22 is: 427.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.05 : 1,249.52 = 285.22 : x
  2. Step 2: Convert to fraction form
    833.05/1,249.52 = 285.22/x
  3. Step 3: Cross multiply
    833.05x = 1,249.52 × 285.22
  4. Step 4: Simplify right side
    833.05x = 356,383.54
  5. Step 5: Solve for x
    x = 356,383.54/833.05
  6. Step 6: Final answer
    x = 427.81

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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.