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Finding the Fourth Proportional to 694.06, 957.79 and 399.34

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Solution

The fourth proportional to 694.06, 957.79 and 399.34 is: 551.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.06 : 957.79 = 399.34 : x
  2. Step 2: Convert to fraction form
    694.06/957.79 = 399.34/x
  3. Step 3: Cross multiply
    694.06x = 957.79 × 399.34
  4. Step 4: Simplify right side
    694.06x = 382,485.56
  5. Step 5: Solve for x
    x = 382,485.56/694.06
  6. Step 6: Final answer
    x = 551.09

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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.