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Finding the Fourth Proportional to 3,293.71, 4,940.20 and 828.53

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Solution

The fourth proportional to 3,293.71, 4,940.20 and 828.53 is: 1,242.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,293.71 : 4,940.20 = 828.53 : x
  2. Step 2: Convert to fraction form
    3,293.71/4,940.20 = 828.53/x
  3. Step 3: Cross multiply
    3,293.71x = 4,940.20 × 828.53
  4. Step 4: Simplify right side
    3,293.71x = 4,093,085.62
  5. Step 5: Solve for x
    x = 4,093,085.62/3,293.71
  6. Step 6: Final answer
    x = 1,242.70

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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.