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Finding the Fourth Proportional to 228.55, 315.86 and 173.27

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Solution

The fourth proportional to 228.55, 315.86 and 173.27 is: 239.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.55 : 315.86 = 173.27 : x
  2. Step 2: Convert to fraction form
    228.55/315.86 = 173.27/x
  3. Step 3: Cross multiply
    228.55x = 315.86 × 173.27
  4. Step 4: Simplify right side
    228.55x = 54,729.06
  5. Step 5: Solve for x
    x = 54,729.06/228.55
  6. Step 6: Final answer
    x = 239.46

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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.