Home / 2,819.81-3,891.34-1,577.81

Finding the Fourth Proportional to 2,819.81, 3,891.34 and 1,577.81

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Solution

The fourth proportional to 2,819.81, 3,891.34 and 1,577.81 is: 2,177.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.81 : 3,891.34 = 1,577.81 : x
  2. Step 2: Convert to fraction form
    2,819.81/3,891.34 = 1,577.81/x
  3. Step 3: Cross multiply
    2,819.81x = 3,891.34 × 1,577.81
  4. Step 4: Simplify right side
    2,819.81x = 6,139,806.87
  5. Step 5: Solve for x
    x = 6,139,806.87/2,819.81
  6. Step 6: Final answer
    x = 2,177.38

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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.