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Finding the Fourth Proportional to 3,295.72, 4,940.70 and 2,811.88

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Solution

The fourth proportional to 3,295.72, 4,940.70 and 2,811.88 is: 4,215.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,295.72 : 4,940.70 = 2,811.88 : x
  2. Step 2: Convert to fraction form
    3,295.72/4,940.70 = 2,811.88/x
  3. Step 3: Cross multiply
    3,295.72x = 4,940.70 × 2,811.88
  4. Step 4: Simplify right side
    3,295.72x = 13,892,655.52
  5. Step 5: Solve for x
    x = 13,892,655.52/3,295.72
  6. Step 6: Final answer
    x = 4,215.36

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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.