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Finding the Fourth Proportional to 451.85, 626.40 and 445.37

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Solution

The fourth proportional to 451.85, 626.40 and 445.37 is: 617.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.85 : 626.40 = 445.37 : x
  2. Step 2: Convert to fraction form
    451.85/626.40 = 445.37/x
  3. Step 3: Cross multiply
    451.85x = 626.40 × 445.37
  4. Step 4: Simplify right side
    451.85x = 278,976.64
  5. Step 5: Solve for x
    x = 278,976.64/451.85
  6. Step 6: Final answer
    x = 617.42

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.