Home / 4,072.80-6,109.09-1,299.64

Finding the Fourth Proportional to 4,072.80, 6,109.09 and 1,299.64

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Solution

The fourth proportional to 4,072.80, 6,109.09 and 1,299.64 is: 1,949.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,072.80 : 6,109.09 = 1,299.64 : x
  2. Step 2: Convert to fraction form
    4,072.80/6,109.09 = 1,299.64/x
  3. Step 3: Cross multiply
    4,072.80x = 6,109.09 × 1,299.64
  4. Step 4: Simplify right side
    4,072.80x = 7,939,599.21
  5. Step 5: Solve for x
    x = 7,939,599.21/4,072.80
  6. Step 6: Final answer
    x = 1,949.42

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Double scale
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Similar ratio
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1.5x scale

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.