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Finding the Fourth Proportional to 3,334.40, 4,995.20 and 1,964.80

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Solution

The fourth proportional to 3,334.40, 4,995.20 and 1,964.80 is: 2,943.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,334.40 : 4,995.20 = 1,964.80 : x
  2. Step 2: Convert to fraction form
    3,334.40/4,995.20 = 1,964.80/x
  3. Step 3: Cross multiply
    3,334.40x = 4,995.20 × 1,964.80
  4. Step 4: Simplify right side
    3,334.40x = 9,814,568.96
  5. Step 5: Solve for x
    x = 9,814,568.96/3,334.40
  6. Step 6: Final answer
    x = 2,943.43

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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.