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Finding the Fourth Proportional to 354.41, 489.07 and 197.05

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Solution

The fourth proportional to 354.41, 489.07 and 197.05 is: 271.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.41 : 489.07 = 197.05 : x
  2. Step 2: Convert to fraction form
    354.41/489.07 = 197.05/x
  3. Step 3: Cross multiply
    354.41x = 489.07 × 197.05
  4. Step 4: Simplify right side
    354.41x = 96,367.81
  5. Step 5: Solve for x
    x = 96,367.81/354.41
  6. Step 6: Final answer
    x = 271.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.