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Finding the Fourth Proportional to 382.13, 572.78 and 228.09

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Solution

The fourth proportional to 382.13, 572.78 and 228.09 is: 341.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.13 : 572.78 = 228.09 : x
  2. Step 2: Convert to fraction form
    382.13/572.78 = 228.09/x
  3. Step 3: Cross multiply
    382.13x = 572.78 × 228.09
  4. Step 4: Simplify right side
    382.13x = 130,645.39
  5. Step 5: Solve for x
    x = 130,645.39/382.13
  6. Step 6: Final answer
    x = 341.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.