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Finding the Fourth Proportional to 2,939.39, 4,409.09 and 748.30

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Solution

The fourth proportional to 2,939.39, 4,409.09 and 748.30 is: 1,122.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.39 : 4,409.09 = 748.30 : x
  2. Step 2: Convert to fraction form
    2,939.39/4,409.09 = 748.30/x
  3. Step 3: Cross multiply
    2,939.39x = 4,409.09 × 748.30
  4. Step 4: Simplify right side
    2,939.39x = 3,299,322.05
  5. Step 5: Solve for x
    x = 3,299,322.05/2,939.39
  6. Step 6: Final answer
    x = 1,122.45

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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.