Home / 2,163.81-2,985.88-1,279.45

Finding the Fourth Proportional to 2,163.81, 2,985.88 and 1,279.45

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Solution

The fourth proportional to 2,163.81, 2,985.88 and 1,279.45 is: 1,765.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.81 : 2,985.88 = 1,279.45 : x
  2. Step 2: Convert to fraction form
    2,163.81/2,985.88 = 1,279.45/x
  3. Step 3: Cross multiply
    2,163.81x = 2,985.88 × 1,279.45
  4. Step 4: Simplify right side
    2,163.81x = 3,820,284.17
  5. Step 5: Solve for x
    x = 3,820,284.17/2,163.81
  6. Step 6: Final answer
    x = 1,765.54

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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.