Home / 1,438.44-2,147.31-1,219.80

Finding the Fourth Proportional to 1,438.44, 2,147.31 and 1,219.80

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Solution

The fourth proportional to 1,438.44, 2,147.31 and 1,219.80 is: 1,820.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.44 : 2,147.31 = 1,219.80 : x
  2. Step 2: Convert to fraction form
    1,438.44/2,147.31 = 1,219.80/x
  3. Step 3: Cross multiply
    1,438.44x = 2,147.31 × 1,219.80
  4. Step 4: Simplify right side
    1,438.44x = 2,619,288.74
  5. Step 5: Solve for x
    x = 2,619,288.74/1,438.44
  6. Step 6: Final answer
    x = 1,820.92

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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.