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Finding the Fourth Proportional to 269.55, 371.78 and 228.33

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Solution

The fourth proportional to 269.55, 371.78 and 228.33 is: 314.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.55 : 371.78 = 228.33 : x
  2. Step 2: Convert to fraction form
    269.55/371.78 = 228.33/x
  3. Step 3: Cross multiply
    269.55x = 371.78 × 228.33
  4. Step 4: Simplify right side
    269.55x = 84,887.39
  5. Step 5: Solve for x
    x = 84,887.39/269.55
  6. Step 6: Final answer
    x = 314.92

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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.