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Finding the Fourth Proportional to 741.50, 1,112.33 and 330.61

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Solution

The fourth proportional to 741.50, 1,112.33 and 330.61 is: 495.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.50 : 1,112.33 = 330.61 : x
  2. Step 2: Convert to fraction form
    741.50/1,112.33 = 330.61/x
  3. Step 3: Cross multiply
    741.50x = 1,112.33 × 330.61
  4. Step 4: Simplify right side
    741.50x = 367,744.42
  5. Step 5: Solve for x
    x = 367,744.42/741.50
  6. Step 6: Final answer
    x = 495.94

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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.