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Finding the Fourth Proportional to 265.01, 396.95 and 221.16

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Solution

The fourth proportional to 265.01, 396.95 and 221.16 is: 331.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.01 : 396.95 = 221.16 : x
  2. Step 2: Convert to fraction form
    265.01/396.95 = 221.16/x
  3. Step 3: Cross multiply
    265.01x = 396.95 × 221.16
  4. Step 4: Simplify right side
    265.01x = 87,788.36
  5. Step 5: Solve for x
    x = 87,788.36/265.01
  6. Step 6: Final answer
    x = 331.27

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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.