Home / 2,129.08-3,193.80-668.56

Finding the Fourth Proportional to 2,129.08, 3,193.80 and 668.56

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Solution

The fourth proportional to 2,129.08, 3,193.80 and 668.56 is: 1,002.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.08 : 3,193.80 = 668.56 : x
  2. Step 2: Convert to fraction form
    2,129.08/3,193.80 = 668.56/x
  3. Step 3: Cross multiply
    2,129.08x = 3,193.80 × 668.56
  4. Step 4: Simplify right side
    2,129.08x = 2,135,246.93
  5. Step 5: Solve for x
    x = 2,135,246.93/2,129.08
  6. Step 6: Final answer
    x = 1,002.90

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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.