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Finding the Fourth Proportional to 833.67, 1,250.42 and 285.77

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Solution

The fourth proportional to 833.67, 1,250.42 and 285.77 is: 428.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.67 : 1,250.42 = 285.77 : x
  2. Step 2: Convert to fraction form
    833.67/1,250.42 = 285.77/x
  3. Step 3: Cross multiply
    833.67x = 1,250.42 × 285.77
  4. Step 4: Simplify right side
    833.67x = 357,334.22
  5. Step 5: Solve for x
    x = 357,334.22/833.67
  6. Step 6: Final answer
    x = 428.63

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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.