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Finding the Fourth Proportional to 2,720.07, 4,080.09 and 668.07

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Solution

The fourth proportional to 2,720.07, 4,080.09 and 668.07 is: 1,002.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.07 : 4,080.09 = 668.07 : x
  2. Step 2: Convert to fraction form
    2,720.07/4,080.09 = 668.07/x
  3. Step 3: Cross multiply
    2,720.07x = 4,080.09 × 668.07
  4. Step 4: Simplify right side
    2,720.07x = 2,725,785.73
  5. Step 5: Solve for x
    x = 2,725,785.73/2,720.07
  6. Step 6: Final answer
    x = 1,002.10

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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.