Home / 2,639.62-3,956.19-1,911.70

Finding the Fourth Proportional to 2,639.62, 3,956.19 and 1,911.70

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Solution

The fourth proportional to 2,639.62, 3,956.19 and 1,911.70 is: 2,865.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.62 : 3,956.19 = 1,911.70 : x
  2. Step 2: Convert to fraction form
    2,639.62/3,956.19 = 1,911.70/x
  3. Step 3: Cross multiply
    2,639.62x = 3,956.19 × 1,911.70
  4. Step 4: Simplify right side
    2,639.62x = 7,563,048.42
  5. Step 5: Solve for x
    x = 7,563,048.42/2,639.62
  6. Step 6: Final answer
    x = 2,865.20

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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.