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Finding the Fourth Proportional to 190.96, 285.06 and 178

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Solution

The fourth proportional to 190.96, 285.06 and 178 is: 265.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.96 : 285.06 = 178 : x
  2. Step 2: Convert to fraction form
    190.96/285.06 = 178/x
  3. Step 3: Cross multiply
    190.96x = 285.06 × 178
  4. Step 4: Simplify right side
    190.96x = 50,740.68
  5. Step 5: Solve for x
    x = 50,740.68/190.96
  6. Step 6: Final answer
    x = 265.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.