Home / 2,819.21-3,890.70-1,873.40

Finding the Fourth Proportional to 2,819.21, 3,890.70 and 1,873.40

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Solution

The fourth proportional to 2,819.21, 3,890.70 and 1,873.40 is: 2,585.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.21 : 3,890.70 = 1,873.40 : x
  2. Step 2: Convert to fraction form
    2,819.21/3,890.70 = 1,873.40/x
  3. Step 3: Cross multiply
    2,819.21x = 3,890.70 × 1,873.40
  4. Step 4: Simplify right side
    2,819.21x = 7,288,817.93
  5. Step 5: Solve for x
    x = 7,288,817.93/2,819.21
  6. Step 6: Final answer
    x = 2,585.42

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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.