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Finding the Fourth Proportional to 850.55, 1,268.52 and 779.81

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Solution

The fourth proportional to 850.55, 1,268.52 and 779.81 is: 1,163.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.55 : 1,268.52 = 779.81 : x
  2. Step 2: Convert to fraction form
    850.55/1,268.52 = 779.81/x
  3. Step 3: Cross multiply
    850.55x = 1,268.52 × 779.81
  4. Step 4: Simplify right side
    850.55x = 989,195.31
  5. Step 5: Solve for x
    x = 989,195.31/850.55
  6. Step 6: Final answer
    x = 1,163.01

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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.