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Finding the Fourth Proportional to 679.75, 1,020.29 and 333.92

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Solution

The fourth proportional to 679.75, 1,020.29 and 333.92 is: 501.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.75 : 1,020.29 = 333.92 : x
  2. Step 2: Convert to fraction form
    679.75/1,020.29 = 333.92/x
  3. Step 3: Cross multiply
    679.75x = 1,020.29 × 333.92
  4. Step 4: Simplify right side
    679.75x = 340,696.12
  5. Step 5: Solve for x
    x = 340,696.12/679.75
  6. Step 6: Final answer
    x = 501.21

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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.