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Finding the Fourth Proportional to 268.41, 402.71 and 220.35

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Solution

The fourth proportional to 268.41, 402.71 and 220.35 is: 330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.41 : 402.71 = 220.35 : x
  2. Step 2: Convert to fraction form
    268.41/402.71 = 220.35/x
  3. Step 3: Cross multiply
    268.41x = 402.71 × 220.35
  4. Step 4: Simplify right side
    268.41x = 88,736.05
  5. Step 5: Solve for x
    x = 88,736.05/268.41
  6. Step 6: Final answer
    x = 330.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.