Home / 2,818.20-3,889.14-1,639.62

Finding the Fourth Proportional to 2,818.20, 3,889.14 and 1,639.62

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Solution

The fourth proportional to 2,818.20, 3,889.14 and 1,639.62 is: 2,262.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.20 : 3,889.14 = 1,639.62 : x
  2. Step 2: Convert to fraction form
    2,818.20/3,889.14 = 1,639.62/x
  3. Step 3: Cross multiply
    2,818.20x = 3,889.14 × 1,639.62
  4. Step 4: Simplify right side
    2,818.20x = 6,376,711.73
  5. Step 5: Solve for x
    x = 6,376,711.73/2,818.20
  6. Step 6: Final answer
    x = 2,262.69

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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.