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Finding the Fourth Proportional to 445.65, 667.26 and 228.80

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Solution

The fourth proportional to 445.65, 667.26 and 228.80 is: 342.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.65 : 667.26 = 228.80 : x
  2. Step 2: Convert to fraction form
    445.65/667.26 = 228.80/x
  3. Step 3: Cross multiply
    445.65x = 667.26 × 228.80
  4. Step 4: Simplify right side
    445.65x = 152,665.75
  5. Step 5: Solve for x
    x = 152,665.75/445.65
  6. Step 6: Final answer
    x = 342.57

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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.