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Finding the Fourth Proportional to 845.91, 1,268 and 406.51

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Solution

The fourth proportional to 845.91, 1,268 and 406.51 is: 609.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.91 : 1,268 = 406.51 : x
  2. Step 2: Convert to fraction form
    845.91/1,268 = 406.51/x
  3. Step 3: Cross multiply
    845.91x = 1,268 × 406.51
  4. Step 4: Simplify right side
    845.91x = 515,454.68
  5. Step 5: Solve for x
    x = 515,454.68/845.91
  6. Step 6: Final answer
    x = 609.35

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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.