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Finding the Fourth Proportional to 489.42, 734.11 and 200.86

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Solution

The fourth proportional to 489.42, 734.11 and 200.86 is: 301.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.42 : 734.11 = 200.86 : x
  2. Step 2: Convert to fraction form
    489.42/734.11 = 200.86/x
  3. Step 3: Cross multiply
    489.42x = 734.11 × 200.86
  4. Step 4: Simplify right side
    489.42x = 147,453.33
  5. Step 5: Solve for x
    x = 147,453.33/489.42
  6. Step 6: Final answer
    x = 301.28

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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.