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Finding the Fourth Proportional to 262.32, 361.66 and 217.90

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Solution

The fourth proportional to 262.32, 361.66 and 217.90 is: 300.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.32 : 361.66 = 217.90 : x
  2. Step 2: Convert to fraction form
    262.32/361.66 = 217.90/x
  3. Step 3: Cross multiply
    262.32x = 361.66 × 217.90
  4. Step 4: Simplify right side
    262.32x = 78,805.71
  5. Step 5: Solve for x
    x = 78,805.71/262.32
  6. Step 6: Final answer
    x = 300.42

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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.