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Finding the Fourth Proportional to 694.01, 957.94 and 399.47

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Solution

The fourth proportional to 694.01, 957.94 and 399.47 is: 551.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.01 : 957.94 = 399.47 : x
  2. Step 2: Convert to fraction form
    694.01/957.94 = 399.47/x
  3. Step 3: Cross multiply
    694.01x = 957.94 × 399.47
  4. Step 4: Simplify right side
    694.01x = 382,670.14
  5. Step 5: Solve for x
    x = 382,670.14/694.01
  6. Step 6: Final answer
    x = 551.39

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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.