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Finding the Fourth Proportional to 297.91, 411.28 and 193.15

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Solution

The fourth proportional to 297.91, 411.28 and 193.15 is: 266.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.91 : 411.28 = 193.15 : x
  2. Step 2: Convert to fraction form
    297.91/411.28 = 193.15/x
  3. Step 3: Cross multiply
    297.91x = 411.28 × 193.15
  4. Step 4: Simplify right side
    297.91x = 79,438.73
  5. Step 5: Solve for x
    x = 79,438.73/297.91
  6. Step 6: Final answer
    x = 266.65

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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.