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Finding the Fourth Proportional to 289.97, 433.91 and 270.66

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Solution

The fourth proportional to 289.97, 433.91 and 270.66 is: 405.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.97 : 433.91 = 270.66 : x
  2. Step 2: Convert to fraction form
    289.97/433.91 = 270.66/x
  3. Step 3: Cross multiply
    289.97x = 433.91 × 270.66
  4. Step 4: Simplify right side
    289.97x = 117,440.73
  5. Step 5: Solve for x
    x = 117,440.73/289.97
  6. Step 6: Final answer
    x = 405.02

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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.