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Finding the Fourth Proportional to 228.08, 315 and 140.96

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Solution

The fourth proportional to 228.08, 315 and 140.96 is: 194.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.08 : 315 = 140.96 : x
  2. Step 2: Convert to fraction form
    228.08/315 = 140.96/x
  3. Step 3: Cross multiply
    228.08x = 315 × 140.96
  4. Step 4: Simplify right side
    228.08x = 44,402.40
  5. Step 5: Solve for x
    x = 44,402.40/228.08
  6. Step 6: Final answer
    x = 194.68

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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.