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Finding the Fourth Proportional to 262.26, 361.37 and 215.48

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Solution

The fourth proportional to 262.26, 361.37 and 215.48 is: 296.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.26 : 361.37 = 215.48 : x
  2. Step 2: Convert to fraction form
    262.26/361.37 = 215.48/x
  3. Step 3: Cross multiply
    262.26x = 361.37 × 215.48
  4. Step 4: Simplify right side
    262.26x = 77,865.12
  5. Step 5: Solve for x
    x = 77,865.12/262.26
  6. Step 6: Final answer
    x = 296.90

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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.