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Finding the Fourth Proportional to 3,390.70, 5,079.30 and 2,984.80

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Solution

The fourth proportional to 3,390.70, 5,079.30 and 2,984.80 is: 4,471.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.70 : 5,079.30 = 2,984.80 : x
  2. Step 2: Convert to fraction form
    3,390.70/5,079.30 = 2,984.80/x
  3. Step 3: Cross multiply
    3,390.70x = 5,079.30 × 2,984.80
  4. Step 4: Simplify right side
    3,390.70x = 15,160,694.64
  5. Step 5: Solve for x
    x = 15,160,694.64/3,390.70
  6. Step 6: Final answer
    x = 4,471.26

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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.