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Finding the Fourth Proportional to 190.14, 261.72 and 158.70

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Solution

The fourth proportional to 190.14, 261.72 and 158.70 is: 218.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.14 : 261.72 = 158.70 : x
  2. Step 2: Convert to fraction form
    190.14/261.72 = 158.70/x
  3. Step 3: Cross multiply
    190.14x = 261.72 × 158.70
  4. Step 4: Simplify right side
    190.14x = 41,535.35
  5. Step 5: Solve for x
    x = 41,535.35/190.14
  6. Step 6: Final answer
    x = 218.44

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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.