Home / 3,415.81-5,120.69-1,334.36

Finding the Fourth Proportional to 3,415.81, 5,120.69 and 1,334.36

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Solution

The fourth proportional to 3,415.81, 5,120.69 and 1,334.36 is: 2,000.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,415.81 : 5,120.69 = 1,334.36 : x
  2. Step 2: Convert to fraction form
    3,415.81/5,120.69 = 1,334.36/x
  3. Step 3: Cross multiply
    3,415.81x = 5,120.69 × 1,334.36
  4. Step 4: Simplify right side
    3,415.81x = 6,832,843.91
  5. Step 5: Solve for x
    x = 6,832,843.91/3,415.81
  6. Step 6: Final answer
    x = 2,000.36

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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.