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Finding the Fourth Proportional to 265.95, 398.01 and 220.39

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Solution

The fourth proportional to 265.95, 398.01 and 220.39 is: 329.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.95 : 398.01 = 220.39 : x
  2. Step 2: Convert to fraction form
    265.95/398.01 = 220.39/x
  3. Step 3: Cross multiply
    265.95x = 398.01 × 220.39
  4. Step 4: Simplify right side
    265.95x = 87,717.26
  5. Step 5: Solve for x
    x = 87,717.26/265.95
  6. Step 6: Final answer
    x = 329.83

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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.