Home / 2,639.39-3,638.16-2,078.97

Finding the Fourth Proportional to 2,639.39, 3,638.16 and 2,078.97

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Solution

The fourth proportional to 2,639.39, 3,638.16 and 2,078.97 is: 2,865.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.39 : 3,638.16 = 2,078.97 : x
  2. Step 2: Convert to fraction form
    2,639.39/3,638.16 = 2,078.97/x
  3. Step 3: Cross multiply
    2,639.39x = 3,638.16 × 2,078.97
  4. Step 4: Simplify right side
    2,639.39x = 7,563,625.50
  5. Step 5: Solve for x
    x = 7,563,625.50/2,639.39
  6. Step 6: Final answer
    x = 2,865.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.