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Finding the Fourth Proportional to 190.88, 282.74 and 188.72

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Solution

The fourth proportional to 190.88, 282.74 and 188.72 is: 279.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.88 : 282.74 = 188.72 : x
  2. Step 2: Convert to fraction form
    190.88/282.74 = 188.72/x
  3. Step 3: Cross multiply
    190.88x = 282.74 × 188.72
  4. Step 4: Simplify right side
    190.88x = 53,358.69
  5. Step 5: Solve for x
    x = 53,358.69/190.88
  6. Step 6: Final answer
    x = 279.54

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.