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Finding the Fourth Proportional to 489.78, 734.13 and 197.10

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Solution

The fourth proportional to 489.78, 734.13 and 197.10 is: 295.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.78 : 734.13 = 197.10 : x
  2. Step 2: Convert to fraction form
    489.78/734.13 = 197.10/x
  3. Step 3: Cross multiply
    489.78x = 734.13 × 197.10
  4. Step 4: Simplify right side
    489.78x = 144,697.02
  5. Step 5: Solve for x
    x = 144,697.02/489.78
  6. Step 6: Final answer
    x = 295.43

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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.