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Finding the Fourth Proportional to 228.43, 315.25 and 135.18

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Solution

The fourth proportional to 228.43, 315.25 and 135.18 is: 186.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.43 : 315.25 = 135.18 : x
  2. Step 2: Convert to fraction form
    228.43/315.25 = 135.18/x
  3. Step 3: Cross multiply
    228.43x = 315.25 × 135.18
  4. Step 4: Simplify right side
    228.43x = 42,615.16
  5. Step 5: Solve for x
    x = 42,615.16/228.43
  6. Step 6: Final answer
    x = 186.56

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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.