Home / 2,639.62-3,958.64-1,389.54

Finding the Fourth Proportional to 2,639.62, 3,958.64 and 1,389.54

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Solution

The fourth proportional to 2,639.62, 3,958.64 and 1,389.54 is: 2,083.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.62 : 3,958.64 = 1,389.54 : x
  2. Step 2: Convert to fraction form
    2,639.62/3,958.64 = 1,389.54/x
  3. Step 3: Cross multiply
    2,639.62x = 3,958.64 × 1,389.54
  4. Step 4: Simplify right side
    2,639.62x = 5,500,681.68
  5. Step 5: Solve for x
    x = 5,500,681.68/2,639.62
  6. Step 6: Final answer
    x = 2,083.89

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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.