Home / 428,993,077.50-643,393,850.49-198,932,268.06

Finding the Fourth Proportional to 428,993,077.50, 643,393,850.49 and 198,932,268.06

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Solution

The fourth proportional to 428,993,077.50, 643,393,850.49 and 198,932,268.06 is: 298,353,993.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,993,077.50 : 643,393,850.49 = 198,932,268.06 : x
  2. Step 2: Convert to fraction form
    428,993,077.50/643,393,850.49 = 198,932,268.06/x
  3. Step 3: Cross multiply
    428,993,077.50x = 643,393,850.49 × 198,932,268.06
  4. Step 4: Simplify right side
    428,993,077.50x = 127,991,797,933,832,240
  5. Step 5: Solve for x
    x = 127,991,797,933,832,240/428,993,077.50
  6. Step 6: Final answer
    x = 298,353,993.68

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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.