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Finding the Fourth Proportional to 201.30, 302.13 and 137.58

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Solution

The fourth proportional to 201.30, 302.13 and 137.58 is: 206.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.30 : 302.13 = 137.58 : x
  2. Step 2: Convert to fraction form
    201.30/302.13 = 137.58/x
  3. Step 3: Cross multiply
    201.30x = 302.13 × 137.58
  4. Step 4: Simplify right side
    201.30x = 41,567.05
  5. Step 5: Solve for x
    x = 41,567.05/201.30
  6. Step 6: Final answer
    x = 206.49

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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.