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Finding the Fourth Proportional to 2,650.63, 3,975.94 and 826.63

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Solution

The fourth proportional to 2,650.63, 3,975.94 and 826.63 is: 1,239.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,650.63 : 3,975.94 = 826.63 : x
  2. Step 2: Convert to fraction form
    2,650.63/3,975.94 = 826.63/x
  3. Step 3: Cross multiply
    2,650.63x = 3,975.94 × 826.63
  4. Step 4: Simplify right side
    2,650.63x = 3,286,611.40
  5. Step 5: Solve for x
    x = 3,286,611.40/2,650.63
  6. Step 6: Final answer
    x = 1,239.94

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Similar ratio
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1.5x scale

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.