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Finding the Fourth Proportional to 842.25, 1,261.23 and 450.81

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Solution

The fourth proportional to 842.25, 1,261.23 and 450.81 is: 675.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.25 : 1,261.23 = 450.81 : x
  2. Step 2: Convert to fraction form
    842.25/1,261.23 = 450.81/x
  3. Step 3: Cross multiply
    842.25x = 1,261.23 × 450.81
  4. Step 4: Simplify right side
    842.25x = 568,575.10
  5. Step 5: Solve for x
    x = 568,575.10/842.25
  6. Step 6: Final answer
    x = 675.07

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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.