Home / 1,855.21-2,769.55-1,790.31

Finding the Fourth Proportional to 1,855.21, 2,769.55 and 1,790.31

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Solution

The fourth proportional to 1,855.21, 2,769.55 and 1,790.31 is: 2,672.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.21 : 2,769.55 = 1,790.31 : x
  2. Step 2: Convert to fraction form
    1,855.21/2,769.55 = 1,790.31/x
  3. Step 3: Cross multiply
    1,855.21x = 2,769.55 × 1,790.31
  4. Step 4: Simplify right side
    1,855.21x = 4,958,353.06
  5. Step 5: Solve for x
    x = 4,958,353.06/1,855.21
  6. Step 6: Final answer
    x = 2,672.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.