Home / 1,427.58-2,142.81-1,378.62

Finding the Fourth Proportional to 1,427.58, 2,142.81 and 1,378.62

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Solution

The fourth proportional to 1,427.58, 2,142.81 and 1,378.62 is: 2,069.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.58 : 2,142.81 = 1,378.62 : x
  2. Step 2: Convert to fraction form
    1,427.58/2,142.81 = 1,378.62/x
  3. Step 3: Cross multiply
    1,427.58x = 2,142.81 × 1,378.62
  4. Step 4: Simplify right side
    1,427.58x = 2,954,120.72
  5. Step 5: Solve for x
    x = 2,954,120.72/1,427.58
  6. Step 6: Final answer
    x = 2,069.32

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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.