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Finding the Fourth Proportional to 238.75, 357.21 and 177.66

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Solution

The fourth proportional to 238.75, 357.21 and 177.66 is: 265.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.75 : 357.21 = 177.66 : x
  2. Step 2: Convert to fraction form
    238.75/357.21 = 177.66/x
  3. Step 3: Cross multiply
    238.75x = 357.21 × 177.66
  4. Step 4: Simplify right side
    238.75x = 63,461.93
  5. Step 5: Solve for x
    x = 63,461.93/238.75
  6. Step 6: Final answer
    x = 265.81

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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.