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Finding the Fourth Proportional to 922.11, 1,383.39 and 272.85

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Solution

The fourth proportional to 922.11, 1,383.39 and 272.85 is: 409.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.11 : 1,383.39 = 272.85 : x
  2. Step 2: Convert to fraction form
    922.11/1,383.39 = 272.85/x
  3. Step 3: Cross multiply
    922.11x = 1,383.39 × 272.85
  4. Step 4: Simplify right side
    922.11x = 377,457.96
  5. Step 5: Solve for x
    x = 377,457.96/922.11
  6. Step 6: Final answer
    x = 409.34

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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.