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Finding the Fourth Proportional to 2,668.05, 4,001.76 and 720.41

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Solution

The fourth proportional to 2,668.05, 4,001.76 and 720.41 is: 1,080.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.05 : 4,001.76 = 720.41 : x
  2. Step 2: Convert to fraction form
    2,668.05/4,001.76 = 720.41/x
  3. Step 3: Cross multiply
    2,668.05x = 4,001.76 × 720.41
  4. Step 4: Simplify right side
    2,668.05x = 2,882,887.91
  5. Step 5: Solve for x
    x = 2,882,887.91/2,668.05
  6. Step 6: Final answer
    x = 1,080.52

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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.