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Finding the Fourth Proportional to 203.13, 303.99 and 145.42

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Solution

The fourth proportional to 203.13, 303.99 and 145.42 is: 217.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.13 : 303.99 = 145.42 : x
  2. Step 2: Convert to fraction form
    203.13/303.99 = 145.42/x
  3. Step 3: Cross multiply
    203.13x = 303.99 × 145.42
  4. Step 4: Simplify right side
    203.13x = 44,204.92
  5. Step 5: Solve for x
    x = 44,204.92/203.13
  6. Step 6: Final answer
    x = 217.62

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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.