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Finding the Fourth Proportional to 694.76, 958.60 and 400

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Solution

The fourth proportional to 694.76, 958.60 and 400 is: 551.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.76 : 958.60 = 400 : x
  2. Step 2: Convert to fraction form
    694.76/958.60 = 400/x
  3. Step 3: Cross multiply
    694.76x = 958.60 × 400
  4. Step 4: Simplify right side
    694.76x = 383,440
  5. Step 5: Solve for x
    x = 383,440/694.76
  6. Step 6: Final answer
    x = 551.90

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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.