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Finding the Fourth Proportional to 339.50, 468.33 and 228.79

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Solution

The fourth proportional to 339.50, 468.33 and 228.79 is: 315.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.50 : 468.33 = 228.79 : x
  2. Step 2: Convert to fraction form
    339.50/468.33 = 228.79/x
  3. Step 3: Cross multiply
    339.50x = 468.33 × 228.79
  4. Step 4: Simplify right side
    339.50x = 107,149.22
  5. Step 5: Solve for x
    x = 107,149.22/339.50
  6. Step 6: Final answer
    x = 315.61

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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.