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Finding the Fourth Proportional to 201.86, 302.46 and 120.60

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Solution

The fourth proportional to 201.86, 302.46 and 120.60 is: 180.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.86 : 302.46 = 120.60 : x
  2. Step 2: Convert to fraction form
    201.86/302.46 = 120.60/x
  3. Step 3: Cross multiply
    201.86x = 302.46 × 120.60
  4. Step 4: Simplify right side
    201.86x = 36,476.68
  5. Step 5: Solve for x
    x = 36,476.68/201.86
  6. Step 6: Final answer
    x = 180.70

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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.