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Finding the Fourth Proportional to 2,668.41, 4,002.48 and 720.56

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Solution

The fourth proportional to 2,668.41, 4,002.48 and 720.56 is: 1,080.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.41 : 4,002.48 = 720.56 : x
  2. Step 2: Convert to fraction form
    2,668.41/4,002.48 = 720.56/x
  3. Step 3: Cross multiply
    2,668.41x = 4,002.48 × 720.56
  4. Step 4: Simplify right side
    2,668.41x = 2,884,037.00
  5. Step 5: Solve for x
    x = 2,884,037.00/2,668.41
  6. Step 6: Final answer
    x = 1,080.81

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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.