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Finding the Fourth Proportional to 257.75, 355.52 and 178.91

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Solution

The fourth proportional to 257.75, 355.52 and 178.91 is: 246.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.75 : 355.52 = 178.91 : x
  2. Step 2: Convert to fraction form
    257.75/355.52 = 178.91/x
  3. Step 3: Cross multiply
    257.75x = 355.52 × 178.91
  4. Step 4: Simplify right side
    257.75x = 63,603.41
  5. Step 5: Solve for x
    x = 63,603.41/257.75
  6. Step 6: Final answer
    x = 246.77

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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.