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Finding the Fourth Proportional to 268.47, 400.79 and 220.41

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Solution

The fourth proportional to 268.47, 400.79 and 220.41 is: 329.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.47 : 400.79 = 220.41 : x
  2. Step 2: Convert to fraction form
    268.47/400.79 = 220.41/x
  3. Step 3: Cross multiply
    268.47x = 400.79 × 220.41
  4. Step 4: Simplify right side
    268.47x = 88,338.67
  5. Step 5: Solve for x
    x = 88,338.67/268.47
  6. Step 6: Final answer
    x = 329.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.