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Finding the Fourth Proportional to 892.76, 1,338.72 and 481.84

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Solution

The fourth proportional to 892.76, 1,338.72 and 481.84 is: 722.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.76 : 1,338.72 = 481.84 : x
  2. Step 2: Convert to fraction form
    892.76/1,338.72 = 481.84/x
  3. Step 3: Cross multiply
    892.76x = 1,338.72 × 481.84
  4. Step 4: Simplify right side
    892.76x = 645,048.84
  5. Step 5: Solve for x
    x = 645,048.84/892.76
  6. Step 6: Final answer
    x = 722.53

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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.