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Finding the Fourth Proportional to 2,789.02, 4,183.80 and 939.70

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Solution

The fourth proportional to 2,789.02, 4,183.80 and 939.70 is: 1,409.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.02 : 4,183.80 = 939.70 : x
  2. Step 2: Convert to fraction form
    2,789.02/4,183.80 = 939.70/x
  3. Step 3: Cross multiply
    2,789.02x = 4,183.80 × 939.70
  4. Step 4: Simplify right side
    2,789.02x = 3,931,516.86
  5. Step 5: Solve for x
    x = 3,931,516.86/2,789.02
  6. Step 6: Final answer
    x = 1,409.64

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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.