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Finding the Fourth Proportional to 694.69, 958.69 and 399.95

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Solution

The fourth proportional to 694.69, 958.69 and 399.95 is: 551.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.69 : 958.69 = 399.95 : x
  2. Step 2: Convert to fraction form
    694.69/958.69 = 399.95/x
  3. Step 3: Cross multiply
    694.69x = 958.69 × 399.95
  4. Step 4: Simplify right side
    694.69x = 383,430.51
  5. Step 5: Solve for x
    x = 383,430.51/694.69
  6. Step 6: Final answer
    x = 551.94

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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.