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Finding the Fourth Proportional to 734.81, 1,102.22 and 221.81

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Solution

The fourth proportional to 734.81, 1,102.22 and 221.81 is: 332.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.81 : 1,102.22 = 221.81 : x
  2. Step 2: Convert to fraction form
    734.81/1,102.22 = 221.81/x
  3. Step 3: Cross multiply
    734.81x = 1,102.22 × 221.81
  4. Step 4: Simplify right side
    734.81x = 244,486.73
  5. Step 5: Solve for x
    x = 244,486.73/734.81
  6. Step 6: Final answer
    x = 332.72

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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.