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Finding the Fourth Proportional to 419,328,086.20, 628,992,129.30 and 419,328,086.20

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Solution

The fourth proportional to 419,328,086.20, 628,992,129.30 and 419,328,086.20 is: 628,992,129.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,328,086.20 : 628,992,129.30 = 419,328,086.20 : x
  2. Step 2: Convert to fraction form
    419,328,086.20/628,992,129.30 = 419,328,086.20/x
  3. Step 3: Cross multiply
    419,328,086.20x = 628,992,129.30 × 419,328,086.20
  4. Step 4: Simplify right side
    419,328,086.20x = 263,754,065,814,231,904
  5. Step 5: Solve for x
    x = 263,754,065,814,231,904/419,328,086.20
  6. Step 6: Final answer
    x = 628,992,129.30

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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.