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Finding the Fourth Proportional to 355.03, 489.94 and 197.66

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Solution

The fourth proportional to 355.03, 489.94 and 197.66 is: 272.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.03 : 489.94 = 197.66 : x
  2. Step 2: Convert to fraction form
    355.03/489.94 = 197.66/x
  3. Step 3: Cross multiply
    355.03x = 489.94 × 197.66
  4. Step 4: Simplify right side
    355.03x = 96,839.24
  5. Step 5: Solve for x
    x = 96,839.24/355.03
  6. Step 6: Final answer
    x = 272.76

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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.