Home / 2,163.37-2,985.83-1,279.21

Finding the Fourth Proportional to 2,163.37, 2,985.83 and 1,279.21

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Solution

The fourth proportional to 2,163.37, 2,985.83 and 1,279.21 is: 1,765.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.37 : 2,985.83 = 1,279.21 : x
  2. Step 2: Convert to fraction form
    2,163.37/2,985.83 = 1,279.21/x
  3. Step 3: Cross multiply
    2,163.37x = 2,985.83 × 1,279.21
  4. Step 4: Simplify right side
    2,163.37x = 3,819,503.59
  5. Step 5: Solve for x
    x = 3,819,503.59/2,163.37
  6. Step 6: Final answer
    x = 1,765.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.