Home / 2,163.81-2,985.93-1,219.65

Finding the Fourth Proportional to 2,163.81, 2,985.93 and 1,219.65

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Solution

The fourth proportional to 2,163.81, 2,985.93 and 1,219.65 is: 1,683.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.81 : 2,985.93 = 1,219.65 : x
  2. Step 2: Convert to fraction form
    2,163.81/2,985.93 = 1,219.65/x
  3. Step 3: Cross multiply
    2,163.81x = 2,985.93 × 1,219.65
  4. Step 4: Simplify right side
    2,163.81x = 3,641,789.52
  5. Step 5: Solve for x
    x = 3,641,789.52/2,163.81
  6. Step 6: Final answer
    x = 1,683.04

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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.