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Finding the Fourth Proportional to 203.12, 305.40 and 192.26

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Solution

The fourth proportional to 203.12, 305.40 and 192.26 is: 289.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.12 : 305.40 = 192.26 : x
  2. Step 2: Convert to fraction form
    203.12/305.40 = 192.26/x
  3. Step 3: Cross multiply
    203.12x = 305.40 × 192.26
  4. Step 4: Simplify right side
    203.12x = 58,716.20
  5. Step 5: Solve for x
    x = 58,716.20/203.12
  6. Step 6: Final answer
    x = 289.07

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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.