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Finding the Fourth Proportional to 228.56, 315.30 and 141.28

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Solution

The fourth proportional to 228.56, 315.30 and 141.28 is: 194.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.56 : 315.30 = 141.28 : x
  2. Step 2: Convert to fraction form
    228.56/315.30 = 141.28/x
  3. Step 3: Cross multiply
    228.56x = 315.30 × 141.28
  4. Step 4: Simplify right side
    228.56x = 44,545.58
  5. Step 5: Solve for x
    x = 44,545.58/228.56
  6. Step 6: Final answer
    x = 194.90

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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.