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Finding the Fourth Proportional to 262.10, 361.37 and 209.72

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Solution

The fourth proportional to 262.10, 361.37 and 209.72 is: 289.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.10 : 361.37 = 209.72 : x
  2. Step 2: Convert to fraction form
    262.10/361.37 = 209.72/x
  3. Step 3: Cross multiply
    262.10x = 361.37 × 209.72
  4. Step 4: Simplify right side
    262.10x = 75,787.94
  5. Step 5: Solve for x
    x = 75,787.94/262.10
  6. Step 6: Final answer
    x = 289.15

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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.