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Finding the Fourth Proportional to 845.18, 1,268.03 and 325.23

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Solution

The fourth proportional to 845.18, 1,268.03 and 325.23 is: 487.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.18 : 1,268.03 = 325.23 : x
  2. Step 2: Convert to fraction form
    845.18/1,268.03 = 325.23/x
  3. Step 3: Cross multiply
    845.18x = 1,268.03 × 325.23
  4. Step 4: Simplify right side
    845.18x = 412,399.77
  5. Step 5: Solve for x
    x = 412,399.77/845.18
  6. Step 6: Final answer
    x = 487.94

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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.