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Finding the Fourth Proportional to 833.89, 1,251.01 and 285.92

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Solution

The fourth proportional to 833.89, 1,251.01 and 285.92 is: 428.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.89 : 1,251.01 = 285.92 : x
  2. Step 2: Convert to fraction form
    833.89/1,251.01 = 285.92/x
  3. Step 3: Cross multiply
    833.89x = 1,251.01 × 285.92
  4. Step 4: Simplify right side
    833.89x = 357,687.35
  5. Step 5: Solve for x
    x = 357,687.35/833.89
  6. Step 6: Final answer
    x = 428.94

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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.