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Finding the Fourth Proportional to 190.18, 262.38 and 172.63

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Solution

The fourth proportional to 190.18, 262.38 and 172.63 is: 238.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.18 : 262.38 = 172.63 : x
  2. Step 2: Convert to fraction form
    190.18/262.38 = 172.63/x
  3. Step 3: Cross multiply
    190.18x = 262.38 × 172.63
  4. Step 4: Simplify right side
    190.18x = 45,294.66
  5. Step 5: Solve for x
    x = 45,294.66/190.18
  6. Step 6: Final answer
    x = 238.17

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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.