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Finding the Fourth Proportional to 203.21, 303.11 and 190.45

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Solution

The fourth proportional to 203.21, 303.11 and 190.45 is: 284.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.21 : 303.11 = 190.45 : x
  2. Step 2: Convert to fraction form
    203.21/303.11 = 190.45/x
  3. Step 3: Cross multiply
    203.21x = 303.11 × 190.45
  4. Step 4: Simplify right side
    203.21x = 57,725.78
  5. Step 5: Solve for x
    x = 57,725.78/203.21
  6. Step 6: Final answer
    x = 284.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.