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Finding the Fourth Proportional to 676.22, 1,014.56 and 398.73

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Solution

The fourth proportional to 676.22, 1,014.56 and 398.73 is: 598.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.22 : 1,014.56 = 398.73 : x
  2. Step 2: Convert to fraction form
    676.22/1,014.56 = 398.73/x
  3. Step 3: Cross multiply
    676.22x = 1,014.56 × 398.73
  4. Step 4: Simplify right side
    676.22x = 404,535.51
  5. Step 5: Solve for x
    x = 404,535.51/676.22
  6. Step 6: Final answer
    x = 598.23

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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.