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Finding the Fourth Proportional to 190.75, 263.27 and 153.80

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Solution

The fourth proportional to 190.75, 263.27 and 153.80 is: 212.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.75 : 263.27 = 153.80 : x
  2. Step 2: Convert to fraction form
    190.75/263.27 = 153.80/x
  3. Step 3: Cross multiply
    190.75x = 263.27 × 153.80
  4. Step 4: Simplify right side
    190.75x = 40,488.84
  5. Step 5: Solve for x
    x = 40,488.84/190.75
  6. Step 6: Final answer
    x = 212.26

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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.