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Finding the Fourth Proportional to 2,789.03, 4,182.33 and 939.80

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Solution

The fourth proportional to 2,789.03, 4,182.33 and 939.80 is: 1,409.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.03 : 4,182.33 = 939.80 : x
  2. Step 2: Convert to fraction form
    2,789.03/4,182.33 = 939.80/x
  3. Step 3: Cross multiply
    2,789.03x = 4,182.33 × 939.80
  4. Step 4: Simplify right side
    2,789.03x = 3,930,567.71
  5. Step 5: Solve for x
    x = 3,930,567.71/2,789.03
  6. Step 6: Final answer
    x = 1,409.29

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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.