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Finding the Fourth Proportional to 190.72, 262.36 and 155.67

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Solution

The fourth proportional to 190.72, 262.36 and 155.67 is: 214.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.72 : 262.36 = 155.67 : x
  2. Step 2: Convert to fraction form
    190.72/262.36 = 155.67/x
  3. Step 3: Cross multiply
    190.72x = 262.36 × 155.67
  4. Step 4: Simplify right side
    190.72x = 40,841.58
  5. Step 5: Solve for x
    x = 40,841.58/190.72
  6. Step 6: Final answer
    x = 214.14

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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.