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Finding the Fourth Proportional to 680.37, 1,019.97 and 333.36

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Solution

The fourth proportional to 680.37, 1,019.97 and 333.36 is: 499.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.37 : 1,019.97 = 333.36 : x
  2. Step 2: Convert to fraction form
    680.37/1,019.97 = 333.36/x
  3. Step 3: Cross multiply
    680.37x = 1,019.97 × 333.36
  4. Step 4: Simplify right side
    680.37x = 340,017.20
  5. Step 5: Solve for x
    x = 340,017.20/680.37
  6. Step 6: Final answer
    x = 499.75

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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.