Home / 1,427.20-2,142.40-850.56

Finding the Fourth Proportional to 1,427.20, 2,142.40 and 850.56

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Solution

The fourth proportional to 1,427.20, 2,142.40 and 850.56 is: 1,276.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.20 : 2,142.40 = 850.56 : x
  2. Step 2: Convert to fraction form
    1,427.20/2,142.40 = 850.56/x
  3. Step 3: Cross multiply
    1,427.20x = 2,142.40 × 850.56
  4. Step 4: Simplify right side
    1,427.20x = 1,822,239.74
  5. Step 5: Solve for x
    x = 1,822,239.74/1,427.20
  6. Step 6: Final answer
    x = 1,276.79

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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.