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Finding the Fourth Proportional to 268.29, 404.15 and 220.77

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Solution

The fourth proportional to 268.29, 404.15 and 220.77 is: 332.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.29 : 404.15 = 220.77 : x
  2. Step 2: Convert to fraction form
    268.29/404.15 = 220.77/x
  3. Step 3: Cross multiply
    268.29x = 404.15 × 220.77
  4. Step 4: Simplify right side
    268.29x = 89,223.09
  5. Step 5: Solve for x
    x = 89,223.09/268.29
  6. Step 6: Final answer
    x = 332.56

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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.