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Finding the Fourth Proportional to 201.42, 302.43 and 155.12

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Solution

The fourth proportional to 201.42, 302.43 and 155.12 is: 232.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.42 : 302.43 = 155.12 : x
  2. Step 2: Convert to fraction form
    201.42/302.43 = 155.12/x
  3. Step 3: Cross multiply
    201.42x = 302.43 × 155.12
  4. Step 4: Simplify right side
    201.42x = 46,912.01
  5. Step 5: Solve for x
    x = 46,912.01/201.42
  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.