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Finding the Fourth Proportional to 694.40, 958.32 and 383.92

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Solution

The fourth proportional to 694.40, 958.32 and 383.92 is: 529.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.40 : 958.32 = 383.92 : x
  2. Step 2: Convert to fraction form
    694.40/958.32 = 383.92/x
  3. Step 3: Cross multiply
    694.40x = 958.32 × 383.92
  4. Step 4: Simplify right side
    694.40x = 367,918.21
  5. Step 5: Solve for x
    x = 367,918.21/694.40
  6. Step 6: Final answer
    x = 529.84

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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.