Home / 2,619.80-3,930.10-1,631.86

Finding the Fourth Proportional to 2,619.80, 3,930.10 and 1,631.86

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Solution

The fourth proportional to 2,619.80, 3,930.10 and 1,631.86 is: 2,448.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.80 : 3,930.10 = 1,631.86 : x
  2. Step 2: Convert to fraction form
    2,619.80/3,930.10 = 1,631.86/x
  3. Step 3: Cross multiply
    2,619.80x = 3,930.10 × 1,631.86
  4. Step 4: Simplify right side
    2,619.80x = 6,413,372.99
  5. Step 5: Solve for x
    x = 6,413,372.99/2,619.80
  6. Step 6: Final answer
    x = 2,448.04

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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.