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Finding the Fourth Proportional to 694.80, 1,040.16 and 450.64

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Solution

The fourth proportional to 694.80, 1,040.16 and 450.64 is: 674.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.80 : 1,040.16 = 450.64 : x
  2. Step 2: Convert to fraction form
    694.80/1,040.16 = 450.64/x
  3. Step 3: Cross multiply
    694.80x = 1,040.16 × 450.64
  4. Step 4: Simplify right side
    694.80x = 468,737.70
  5. Step 5: Solve for x
    x = 468,737.70/694.80
  6. Step 6: Final answer
    x = 674.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.