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Finding the Fourth Proportional to 630.87, 945.23 and 445.38

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Solution

The fourth proportional to 630.87, 945.23 and 445.38 is: 667.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.87 : 945.23 = 445.38 : x
  2. Step 2: Convert to fraction form
    630.87/945.23 = 445.38/x
  3. Step 3: Cross multiply
    630.87x = 945.23 × 445.38
  4. Step 4: Simplify right side
    630.87x = 420,984.31
  5. Step 5: Solve for x
    x = 420,984.31/630.87
  6. Step 6: Final answer
    x = 667.31

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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.