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Finding the Fourth Proportional to 2,072.99, 3,109.64 and 757.05

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Solution

The fourth proportional to 2,072.99, 3,109.64 and 757.05 is: 1,135.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.99 : 3,109.64 = 757.05 : x
  2. Step 2: Convert to fraction form
    2,072.99/3,109.64 = 757.05/x
  3. Step 3: Cross multiply
    2,072.99x = 3,109.64 × 757.05
  4. Step 4: Simplify right side
    2,072.99x = 2,354,141.77
  5. Step 5: Solve for x
    x = 2,354,141.77/2,072.99
  6. Step 6: Final answer
    x = 1,135.62

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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.