Home / 812,021,755.80-1,120,560,016.89-440,735,815.56

Finding the Fourth Proportional to 812,021,755.80, 1,120,560,016.89 and 440,735,815.56

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Solution

The fourth proportional to 812,021,755.80, 1,120,560,016.89 and 440,735,815.56 is: 608,199,139.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,021,755.80 : 1,120,560,016.89 = 440,735,815.56 : x
  2. Step 2: Convert to fraction form
    812,021,755.80/1,120,560,016.89 = 440,735,815.56/x
  3. Step 3: Cross multiply
    812,021,755.80x = 1,120,560,016.89 × 440,735,815.56
  4. Step 4: Simplify right side
    812,021,755.80x = 493,870,932,927,941,568
  5. Step 5: Solve for x
    x = 493,870,932,927,941,568/812,021,755.80
  6. Step 6: Final answer
    x = 608,199,139.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.