Home / 3,212.80-4,821.44-1,240.32

Finding the Fourth Proportional to 3,212.80, 4,821.44 and 1,240.32

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Solution

The fourth proportional to 3,212.80, 4,821.44 and 1,240.32 is: 1,861.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,212.80 : 4,821.44 = 1,240.32 : x
  2. Step 2: Convert to fraction form
    3,212.80/4,821.44 = 1,240.32/x
  3. Step 3: Cross multiply
    3,212.80x = 4,821.44 × 1,240.32
  4. Step 4: Simplify right side
    3,212.80x = 5,980,128.46
  5. Step 5: Solve for x
    x = 5,980,128.46/3,212.80
  6. Step 6: Final answer
    x = 1,861.34

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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.