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Finding the Fourth Proportional to 845.80, 1,268.60 and 290.44

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Solution

The fourth proportional to 845.80, 1,268.60 and 290.44 is: 435.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.80 : 1,268.60 = 290.44 : x
  2. Step 2: Convert to fraction form
    845.80/1,268.60 = 290.44/x
  3. Step 3: Cross multiply
    845.80x = 1,268.60 × 290.44
  4. Step 4: Simplify right side
    845.80x = 368,452.18
  5. Step 5: Solve for x
    x = 368,452.18/845.80
  6. Step 6: Final answer
    x = 435.63

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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.