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Finding the Fourth Proportional to 268.59, 404.97 and 215.13

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Solution

The fourth proportional to 268.59, 404.97 and 215.13 is: 324.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.59 : 404.97 = 215.13 : x
  2. Step 2: Convert to fraction form
    268.59/404.97 = 215.13/x
  3. Step 3: Cross multiply
    268.59x = 404.97 × 215.13
  4. Step 4: Simplify right side
    268.59x = 87,121.91
  5. Step 5: Solve for x
    x = 87,121.91/268.59
  6. Step 6: Final answer
    x = 324.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.