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Finding the Fourth Proportional to 850.89, 1,275.41 and 330.73

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Solution

The fourth proportional to 850.89, 1,275.41 and 330.73 is: 495.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.89 : 1,275.41 = 330.73 : x
  2. Step 2: Convert to fraction form
    850.89/1,275.41 = 330.73/x
  3. Step 3: Cross multiply
    850.89x = 1,275.41 × 330.73
  4. Step 4: Simplify right side
    850.89x = 421,816.29
  5. Step 5: Solve for x
    x = 421,816.29/850.89
  6. Step 6: Final answer
    x = 495.74

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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.