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Finding the Fourth Proportional to 338.27, 506.99 and 155.40

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Solution

The fourth proportional to 338.27, 506.99 and 155.40 is: 232.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.27 : 506.99 = 155.40 : x
  2. Step 2: Convert to fraction form
    338.27/506.99 = 155.40/x
  3. Step 3: Cross multiply
    338.27x = 506.99 × 155.40
  4. Step 4: Simplify right side
    338.27x = 78,785.47
  5. Step 5: Solve for x
    x = 78,785.47/338.27
  6. Step 6: Final answer
    x = 232.91

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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.