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Finding the Fourth Proportional to 2,073.12, 3,109.67 and 513.09

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Solution

The fourth proportional to 2,073.12, 3,109.67 and 513.09 is: 769.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,073.12 : 3,109.67 = 513.09 : x
  2. Step 2: Convert to fraction form
    2,073.12/3,109.67 = 513.09/x
  3. Step 3: Cross multiply
    2,073.12x = 3,109.67 × 513.09
  4. Step 4: Simplify right side
    2,073.12x = 1,595,542.31
  5. Step 5: Solve for x
    x = 1,595,542.31/2,073.12
  6. Step 6: Final answer
    x = 769.63

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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.