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Finding the Fourth Proportional to 201.80, 302.46 and 105.50

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Solution

The fourth proportional to 201.80, 302.46 and 105.50 is: 158.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.80 : 302.46 = 105.50 : x
  2. Step 2: Convert to fraction form
    201.80/302.46 = 105.50/x
  3. Step 3: Cross multiply
    201.80x = 302.46 × 105.50
  4. Step 4: Simplify right side
    201.80x = 31,909.53
  5. Step 5: Solve for x
    x = 31,909.53/201.80
  6. Step 6: Final answer
    x = 158.12

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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.