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Finding the Fourth Proportional to 201.84, 302.20 and 105.45

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Solution

The fourth proportional to 201.84, 302.20 and 105.45 is: 157.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.84 : 302.20 = 105.45 : x
  2. Step 2: Convert to fraction form
    201.84/302.20 = 105.45/x
  3. Step 3: Cross multiply
    201.84x = 302.20 × 105.45
  4. Step 4: Simplify right side
    201.84x = 31,866.99
  5. Step 5: Solve for x
    x = 31,866.99/201.84
  6. Step 6: Final answer
    x = 157.88

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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.