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Finding the Fourth Proportional to 299,568,982.20, 420,605,898.60 and 299,568,982.20

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Solution

The fourth proportional to 299,568,982.20, 420,605,898.60 and 299,568,982.20 is: 420,605,898.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,568,982.20 : 420,605,898.60 = 299,568,982.20 : x
  2. Step 2: Convert to fraction form
    299,568,982.20/420,605,898.60 = 299,568,982.20/x
  3. Step 3: Cross multiply
    299,568,982.20x = 420,605,898.60 × 299,568,982.20
  4. Step 4: Simplify right side
    299,568,982.20x = 126,000,480,950,918,400
  5. Step 5: Solve for x
    x = 126,000,480,950,918,400/299,568,982.20
  6. Step 6: Final answer
    x = 420,605,898.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.