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Finding the Fourth Proportional to 190.38, 263.14 and 172.98

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Solution

The fourth proportional to 190.38, 263.14 and 172.98 is: 239.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.38 : 263.14 = 172.98 : x
  2. Step 2: Convert to fraction form
    190.38/263.14 = 172.98/x
  3. Step 3: Cross multiply
    190.38x = 263.14 × 172.98
  4. Step 4: Simplify right side
    190.38x = 45,517.96
  5. Step 5: Solve for x
    x = 45,517.96/190.38
  6. Step 6: Final answer
    x = 239.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.