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Finding the Fourth Proportional to 3,515.51, 5,266.22 and 1,668.42

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Solution

The fourth proportional to 3,515.51, 5,266.22 and 1,668.42 is: 2,499.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,515.51 : 5,266.22 = 1,668.42 : x
  2. Step 2: Convert to fraction form
    3,515.51/5,266.22 = 1,668.42/x
  3. Step 3: Cross multiply
    3,515.51x = 5,266.22 × 1,668.42
  4. Step 4: Simplify right side
    3,515.51x = 8,786,258.43
  5. Step 5: Solve for x
    x = 8,786,258.43/3,515.51
  6. Step 6: Final answer
    x = 2,499.28

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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.