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Finding the Fourth Proportional to 338.22, 507.42 and 121.82

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Solution

The fourth proportional to 338.22, 507.42 and 121.82 is: 182.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.22 : 507.42 = 121.82 : x
  2. Step 2: Convert to fraction form
    338.22/507.42 = 121.82/x
  3. Step 3: Cross multiply
    338.22x = 507.42 × 121.82
  4. Step 4: Simplify right side
    338.22x = 61,813.90
  5. Step 5: Solve for x
    x = 61,813.90/338.22
  6. Step 6: Final answer
    x = 182.76

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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.