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Finding the Fourth Proportional to 741.81, 1,112.88 and 221.82

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Solution

The fourth proportional to 741.81, 1,112.88 and 221.82 is: 332.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.81 : 1,112.88 = 221.82 : x
  2. Step 2: Convert to fraction form
    741.81/1,112.88 = 221.82/x
  3. Step 3: Cross multiply
    741.81x = 1,112.88 × 221.82
  4. Step 4: Simplify right side
    741.81x = 246,859.04
  5. Step 5: Solve for x
    x = 246,859.04/741.81
  6. Step 6: Final answer
    x = 332.78

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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.