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Finding the Fourth Proportional to 190.96, 285.28 and 187.54

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Solution

The fourth proportional to 190.96, 285.28 and 187.54 is: 280.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.96 : 285.28 = 187.54 : x
  2. Step 2: Convert to fraction form
    190.96/285.28 = 187.54/x
  3. Step 3: Cross multiply
    190.96x = 285.28 × 187.54
  4. Step 4: Simplify right side
    190.96x = 53,501.41
  5. Step 5: Solve for x
    x = 53,501.41/190.96
  6. Step 6: Final answer
    x = 280.17

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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.