Home / 812,422,367.96-1,217,783,015.87-339,992,087.81

Finding the Fourth Proportional to 812,422,367.96, 1,217,783,015.87 and 339,992,087.81

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Solution

The fourth proportional to 812,422,367.96, 1,217,783,015.87 and 339,992,087.81 is: 509,632,189.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,422,367.96 : 1,217,783,015.87 = 339,992,087.81 : x
  2. Step 2: Convert to fraction form
    812,422,367.96/1,217,783,015.87 = 339,992,087.81/x
  3. Step 3: Cross multiply
    812,422,367.96x = 1,217,783,015.87 × 339,992,087.81
  4. Step 4: Simplify right side
    812,422,367.96x = 414,036,590,063,499,712
  5. Step 5: Solve for x
    x = 414,036,590,063,499,712/812,422,367.96
  6. Step 6: Final answer
    x = 509,632,189.36

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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.