Home / 3,209.25-4,815.80-1,385.25

Finding the Fourth Proportional to 3,209.25, 4,815.80 and 1,385.25

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Solution

The fourth proportional to 3,209.25, 4,815.80 and 1,385.25 is: 2,078.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,209.25 : 4,815.80 = 1,385.25 : x
  2. Step 2: Convert to fraction form
    3,209.25/4,815.80 = 1,385.25/x
  3. Step 3: Cross multiply
    3,209.25x = 4,815.80 × 1,385.25
  4. Step 4: Simplify right side
    3,209.25x = 6,671,086.95
  5. Step 5: Solve for x
    x = 6,671,086.95/3,209.25
  6. Step 6: Final answer
    x = 2,078.71

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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.