Home / 2,619.36-3,930.12-1,929.51

Finding the Fourth Proportional to 2,619.36, 3,930.12 and 1,929.51

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Solution

The fourth proportional to 2,619.36, 3,930.12 and 1,929.51 is: 2,895.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.36 : 3,930.12 = 1,929.51 : x
  2. Step 2: Convert to fraction form
    2,619.36/3,930.12 = 1,929.51/x
  3. Step 3: Cross multiply
    2,619.36x = 3,930.12 × 1,929.51
  4. Step 4: Simplify right side
    2,619.36x = 7,583,205.84
  5. Step 5: Solve for x
    x = 7,583,205.84/2,619.36
  6. Step 6: Final answer
    x = 2,895.06

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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.