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Finding the Fourth Proportional to 255.34, 382.74 and 174.21

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Solution

The fourth proportional to 255.34, 382.74 and 174.21 is: 261.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.34 : 382.74 = 174.21 : x
  2. Step 2: Convert to fraction form
    255.34/382.74 = 174.21/x
  3. Step 3: Cross multiply
    255.34x = 382.74 × 174.21
  4. Step 4: Simplify right side
    255.34x = 66,677.14
  5. Step 5: Solve for x
    x = 66,677.14/255.34
  6. Step 6: Final answer
    x = 261.13

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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.