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Finding the Fourth Proportional to 190.59, 262.79 and 155.49

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Solution

The fourth proportional to 190.59, 262.79 and 155.49 is: 214.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.59 : 262.79 = 155.49 : x
  2. Step 2: Convert to fraction form
    190.59/262.79 = 155.49/x
  3. Step 3: Cross multiply
    190.59x = 262.79 × 155.49
  4. Step 4: Simplify right side
    190.59x = 40,860.44
  5. Step 5: Solve for x
    x = 40,860.44/190.59
  6. Step 6: Final answer
    x = 214.39

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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.