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Finding the Fourth Proportional to 694.19, 957.49 and 445.12

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Solution

The fourth proportional to 694.19, 957.49 and 445.12 is: 613.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.19 : 957.49 = 445.12 : x
  2. Step 2: Convert to fraction form
    694.19/957.49 = 445.12/x
  3. Step 3: Cross multiply
    694.19x = 957.49 × 445.12
  4. Step 4: Simplify right side
    694.19x = 426,194.44
  5. Step 5: Solve for x
    x = 426,194.44/694.19
  6. Step 6: Final answer
    x = 613.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.