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Finding the Fourth Proportional to 238.52, 330.83 and 228.80

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Solution

The fourth proportional to 238.52, 330.83 and 228.80 is: 317.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.52 : 330.83 = 228.80 : x
  2. Step 2: Convert to fraction form
    238.52/330.83 = 228.80/x
  3. Step 3: Cross multiply
    238.52x = 330.83 × 228.80
  4. Step 4: Simplify right side
    238.52x = 75,693.90
  5. Step 5: Solve for x
    x = 75,693.90/238.52
  6. Step 6: Final answer
    x = 317.35

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.