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Finding the Fourth Proportional to 489.69, 734.45 and 197.19

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Solution

The fourth proportional to 489.69, 734.45 and 197.19 is: 295.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.69 : 734.45 = 197.19 : x
  2. Step 2: Convert to fraction form
    489.69/734.45 = 197.19/x
  3. Step 3: Cross multiply
    489.69x = 734.45 × 197.19
  4. Step 4: Simplify right side
    489.69x = 144,825.21
  5. Step 5: Solve for x
    x = 144,825.21/489.69
  6. Step 6: Final answer
    x = 295.75

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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.