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Finding the Fourth Proportional to 255.49, 352.59 and 193.21

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Solution

The fourth proportional to 255.49, 352.59 and 193.21 is: 266.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.49 : 352.59 = 193.21 : x
  2. Step 2: Convert to fraction form
    255.49/352.59 = 193.21/x
  3. Step 3: Cross multiply
    255.49x = 352.59 × 193.21
  4. Step 4: Simplify right side
    255.49x = 68,123.91
  5. Step 5: Solve for x
    x = 68,123.91/255.49
  6. Step 6: Final answer
    x = 266.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.