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Finding the Fourth Proportional to 445.00, 668.22 and 426.28

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Solution

The fourth proportional to 445.00, 668.22 and 426.28 is: 640.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.00 : 668.22 = 426.28 : x
  2. Step 2: Convert to fraction form
    445.00/668.22 = 426.28/x
  3. Step 3: Cross multiply
    445.00x = 668.22 × 426.28
  4. Step 4: Simplify right side
    445.00x = 284,845.55
  5. Step 5: Solve for x
    x = 284,845.55/445.00
  6. Step 6: Final answer
    x = 640.11

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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.