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Finding the Fourth Proportional to 845.41, 1,268.25 and 455.53

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Solution

The fourth proportional to 845.41, 1,268.25 and 455.53 is: 683.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.41 : 1,268.25 = 455.53 : x
  2. Step 2: Convert to fraction form
    845.41/1,268.25 = 455.53/x
  3. Step 3: Cross multiply
    845.41x = 1,268.25 × 455.53
  4. Step 4: Simplify right side
    845.41x = 577,725.92
  5. Step 5: Solve for x
    x = 577,725.92/845.41
  6. Step 6: Final answer
    x = 683.37

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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.