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Finding the Fourth Proportional to 2,129.44, 3,194.40 and 668.16

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Solution

The fourth proportional to 2,129.44, 3,194.40 and 668.16 is: 1,002.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.44 : 3,194.40 = 668.16 : x
  2. Step 2: Convert to fraction form
    2,129.44/3,194.40 = 668.16/x
  3. Step 3: Cross multiply
    2,129.44x = 3,194.40 × 668.16
  4. Step 4: Simplify right side
    2,129.44x = 2,134,370.30
  5. Step 5: Solve for x
    x = 2,134,370.30/2,129.44
  6. Step 6: Final answer
    x = 1,002.32

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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.