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Finding the Fourth Proportional to 849.92, 1,268.42 and 828.05

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Solution

The fourth proportional to 849.92, 1,268.42 and 828.05 is: 1,235.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.92 : 1,268.42 = 828.05 : x
  2. Step 2: Convert to fraction form
    849.92/1,268.42 = 828.05/x
  3. Step 3: Cross multiply
    849.92x = 1,268.42 × 828.05
  4. Step 4: Simplify right side
    849.92x = 1,050,304.70
  5. Step 5: Solve for x
    x = 1,050,304.70/849.92
  6. Step 6: Final answer
    x = 1,235.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.