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Finding the Fourth Proportional to 2,128.84, 3,193.18 and 668.04

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Solution

The fourth proportional to 2,128.84, 3,193.18 and 668.04 is: 1,002.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.84 : 3,193.18 = 668.04 : x
  2. Step 2: Convert to fraction form
    2,128.84/3,193.18 = 668.04/x
  3. Step 3: Cross multiply
    2,128.84x = 3,193.18 × 668.04
  4. Step 4: Simplify right side
    2,128.84x = 2,133,171.97
  5. Step 5: Solve for x
    x = 2,133,171.97/2,128.84
  6. Step 6: Final answer
    x = 1,002.03

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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.