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Finding the Fourth Proportional to 445.50, 663.53 and 422.37

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Solution

The fourth proportional to 445.50, 663.53 and 422.37 is: 629.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.50 : 663.53 = 422.37 : x
  2. Step 2: Convert to fraction form
    445.50/663.53 = 422.37/x
  3. Step 3: Cross multiply
    445.50x = 663.53 × 422.37
  4. Step 4: Simplify right side
    445.50x = 280,253.05
  5. Step 5: Solve for x
    x = 280,253.05/445.50
  6. Step 6: Final answer
    x = 629.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.