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Finding the Fourth Proportional to 694.90, 958.80 and 474.31

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Solution

The fourth proportional to 694.90, 958.80 and 474.31 is: 654.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.90 : 958.80 = 474.31 : x
  2. Step 2: Convert to fraction form
    694.90/958.80 = 474.31/x
  3. Step 3: Cross multiply
    694.90x = 958.80 × 474.31
  4. Step 4: Simplify right side
    694.90x = 454,768.43
  5. Step 5: Solve for x
    x = 454,768.43/694.90
  6. Step 6: Final answer
    x = 654.44

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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.