Home / 1,818.30-2,723.40-1,405.20

Finding the Fourth Proportional to 1,818.30, 2,723.40 and 1,405.20

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Solution

The fourth proportional to 1,818.30, 2,723.40 and 1,405.20 is: 2,104.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.30 : 2,723.40 = 1,405.20 : x
  2. Step 2: Convert to fraction form
    1,818.30/2,723.40 = 1,405.20/x
  3. Step 3: Cross multiply
    1,818.30x = 2,723.40 × 1,405.20
  4. Step 4: Simplify right side
    1,818.30x = 3,826,921.68
  5. Step 5: Solve for x
    x = 3,826,921.68/1,818.30
  6. Step 6: Final answer
    x = 2,104.67

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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.