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Finding the Fourth Proportional to 201.96, 302.40 and 147.96

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Solution

The fourth proportional to 201.96, 302.40 and 147.96 is: 221.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.96 : 302.40 = 147.96 : x
  2. Step 2: Convert to fraction form
    201.96/302.40 = 147.96/x
  3. Step 3: Cross multiply
    201.96x = 302.40 × 147.96
  4. Step 4: Simplify right side
    201.96x = 44,743.10
  5. Step 5: Solve for x
    x = 44,743.10/201.96
  6. Step 6: Final answer
    x = 221.54

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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.