Home / 428,993,077-643,393,849.74-198,932,267.56

Finding the Fourth Proportional to 428,993,077, 643,393,849.74 and 198,932,267.56

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Solution

The fourth proportional to 428,993,077, 643,393,849.74 and 198,932,267.56 is: 298,353,992.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,993,077 : 643,393,849.74 = 198,932,267.56 : x
  2. Step 2: Convert to fraction form
    428,993,077/643,393,849.74 = 198,932,267.56/x
  3. Step 3: Cross multiply
    428,993,077x = 643,393,849.74 × 198,932,267.56
  4. Step 4: Simplify right side
    428,993,077x = 127,991,797,462,936,112
  5. Step 5: Solve for x
    x = 127,991,797,462,936,112/428,993,077
  6. Step 6: Final answer
    x = 298,353,992.93

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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.