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Finding the Fourth Proportional to 236.47, 326.53 and 228.72

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Solution

The fourth proportional to 236.47, 326.53 and 228.72 is: 315.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.47 : 326.53 = 228.72 : x
  2. Step 2: Convert to fraction form
    236.47/326.53 = 228.72/x
  3. Step 3: Cross multiply
    236.47x = 326.53 × 228.72
  4. Step 4: Simplify right side
    236.47x = 74,684.53
  5. Step 5: Solve for x
    x = 74,684.53/236.47
  6. Step 6: Final answer
    x = 315.84

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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.