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Finding the Fourth Proportional to 676.25, 1,014.86 and 445.05

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Solution

The fourth proportional to 676.25, 1,014.86 and 445.05 is: 667.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.25 : 1,014.86 = 445.05 : x
  2. Step 2: Convert to fraction form
    676.25/1,014.86 = 445.05/x
  3. Step 3: Cross multiply
    676.25x = 1,014.86 × 445.05
  4. Step 4: Simplify right side
    676.25x = 451,661.22
  5. Step 5: Solve for x
    x = 451,661.22/676.25
  6. Step 6: Final answer
    x = 667.90

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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.