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Finding the Fourth Proportional to 3,519.75, 5,279.42 and 922.69

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Solution

The fourth proportional to 3,519.75, 5,279.42 and 922.69 is: 1,383.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,519.75 : 5,279.42 = 922.69 : x
  2. Step 2: Convert to fraction form
    3,519.75/5,279.42 = 922.69/x
  3. Step 3: Cross multiply
    3,519.75x = 5,279.42 × 922.69
  4. Step 4: Simplify right side
    3,519.75x = 4,871,241.64
  5. Step 5: Solve for x
    x = 4,871,241.64/3,519.75
  6. Step 6: Final answer
    x = 1,383.97

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1.5x scale

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.