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Finding the Fourth Proportional to 694.40, 963.04 and 662.40

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Solution

The fourth proportional to 694.40, 963.04 and 662.40 is: 918.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.40 : 963.04 = 662.40 : x
  2. Step 2: Convert to fraction form
    694.40/963.04 = 662.40/x
  3. Step 3: Cross multiply
    694.40x = 963.04 × 662.40
  4. Step 4: Simplify right side
    694.40x = 637,917.70
  5. Step 5: Solve for x
    x = 637,917.70/694.40
  6. Step 6: Final answer
    x = 918.66

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.