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Finding the Fourth Proportional to 338.24, 506.91 and 155.23

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Solution

The fourth proportional to 338.24, 506.91 and 155.23 is: 232.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.24 : 506.91 = 155.23 : x
  2. Step 2: Convert to fraction form
    338.24/506.91 = 155.23/x
  3. Step 3: Cross multiply
    338.24x = 506.91 × 155.23
  4. Step 4: Simplify right side
    338.24x = 78,688.93
  5. Step 5: Solve for x
    x = 78,688.93/338.24
  6. Step 6: Final answer
    x = 232.64

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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.