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Finding the Fourth Proportional to 190.57, 262.75 and 155.57

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Solution

The fourth proportional to 190.57, 262.75 and 155.57 is: 214.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.57 : 262.75 = 155.57 : x
  2. Step 2: Convert to fraction form
    190.57/262.75 = 155.57/x
  3. Step 3: Cross multiply
    190.57x = 262.75 × 155.57
  4. Step 4: Simplify right side
    190.57x = 40,874.61
  5. Step 5: Solve for x
    x = 40,874.61/190.57
  6. Step 6: Final answer
    x = 214.48

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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.