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Finding the Fourth Proportional to 665,634.80, 998,452.20 and 628,893.20

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Solution

The fourth proportional to 665,634.80, 998,452.20 and 628,893.20 is: 943,339.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,634.80 : 998,452.20 = 628,893.20 : x
  2. Step 2: Convert to fraction form
    665,634.80/998,452.20 = 628,893.20/x
  3. Step 3: Cross multiply
    665,634.80x = 998,452.20 × 628,893.20
  4. Step 4: Simplify right side
    665,634.80x = 627,919,799,105.04
  5. Step 5: Solve for x
    x = 627,919,799,105.04/665,634.80
  6. Step 6: Final answer
    x = 943,339.80

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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.