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Finding the Fourth Proportional to 445.20, 667.71 and 228.66

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Solution

The fourth proportional to 445.20, 667.71 and 228.66 is: 342.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.20 : 667.71 = 228.66 : x
  2. Step 2: Convert to fraction form
    445.20/667.71 = 228.66/x
  3. Step 3: Cross multiply
    445.20x = 667.71 × 228.66
  4. Step 4: Simplify right side
    445.20x = 152,678.57
  5. Step 5: Solve for x
    x = 152,678.57/445.20
  6. Step 6: Final answer
    x = 342.94

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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.