Home / 2,628.62-3,940.80-1,069.36

Finding the Fourth Proportional to 2,628.62, 3,940.80 and 1,069.36

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Solution

The fourth proportional to 2,628.62, 3,940.80 and 1,069.36 is: 1,603.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.62 : 3,940.80 = 1,069.36 : x
  2. Step 2: Convert to fraction form
    2,628.62/3,940.80 = 1,069.36/x
  3. Step 3: Cross multiply
    2,628.62x = 3,940.80 × 1,069.36
  4. Step 4: Simplify right side
    2,628.62x = 4,214,133.89
  5. Step 5: Solve for x
    x = 4,214,133.89/2,628.62
  6. Step 6: Final answer
    x = 1,603.17

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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.