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Finding the Fourth Proportional to 694.77, 958.68 and 399.98

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Solution

The fourth proportional to 694.77, 958.68 and 399.98 is: 551.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.77 : 958.68 = 399.98 : x
  2. Step 2: Convert to fraction form
    694.77/958.68 = 399.98/x
  3. Step 3: Cross multiply
    694.77x = 958.68 × 399.98
  4. Step 4: Simplify right side
    694.77x = 383,448.03
  5. Step 5: Solve for x
    x = 383,448.03/694.77
  6. Step 6: Final answer
    x = 551.91

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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.