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Finding the Fourth Proportional to 228.91, 343.64 and 190.85

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Solution

The fourth proportional to 228.91, 343.64 and 190.85 is: 286.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.91 : 343.64 = 190.85 : x
  2. Step 2: Convert to fraction form
    228.91/343.64 = 190.85/x
  3. Step 3: Cross multiply
    228.91x = 343.64 × 190.85
  4. Step 4: Simplify right side
    228.91x = 65,582.74
  5. Step 5: Solve for x
    x = 65,582.74/228.91
  6. Step 6: Final answer
    x = 286.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.