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Finding the Fourth Proportional to 833.88, 1,251 and 285.90

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Solution

The fourth proportional to 833.88, 1,251 and 285.90 is: 428.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.88 : 1,251 = 285.90 : x
  2. Step 2: Convert to fraction form
    833.88/1,251 = 285.90/x
  3. Step 3: Cross multiply
    833.88x = 1,251 × 285.90
  4. Step 4: Simplify right side
    833.88x = 357,660.90
  5. Step 5: Solve for x
    x = 357,660.90/833.88
  6. Step 6: Final answer
    x = 428.91

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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.