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Finding the Fourth Proportional to 2,516.91, 3,775.35 and 668.21

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Solution

The fourth proportional to 2,516.91, 3,775.35 and 668.21 is: 1,002.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,516.91 : 3,775.35 = 668.21 : x
  2. Step 2: Convert to fraction form
    2,516.91/3,775.35 = 668.21/x
  3. Step 3: Cross multiply
    2,516.91x = 3,775.35 × 668.21
  4. Step 4: Simplify right side
    2,516.91x = 2,522,726.62
  5. Step 5: Solve for x
    x = 2,522,726.62/2,516.91
  6. Step 6: Final answer
    x = 1,002.31

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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.