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Finding the Fourth Proportional to 262.41, 361.15 and 209.76

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Solution

The fourth proportional to 262.41, 361.15 and 209.76 is: 288.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.41 : 361.15 = 209.76 : x
  2. Step 2: Convert to fraction form
    262.41/361.15 = 209.76/x
  3. Step 3: Cross multiply
    262.41x = 361.15 × 209.76
  4. Step 4: Simplify right side
    262.41x = 75,754.30
  5. Step 5: Solve for x
    x = 75,754.30/262.41
  6. Step 6: Final answer
    x = 288.69

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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.