Home / 1,278,463,399.80-1,917,695,099.70-865,214,878.20

Finding the Fourth Proportional to 1,278,463,399.80, 1,917,695,099.70 and 865,214,878.20

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Solution

The fourth proportional to 1,278,463,399.80, 1,917,695,099.70 and 865,214,878.20 is: 1,297,822,317.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,463,399.80 : 1,917,695,099.70 = 865,214,878.20 : x
  2. Step 2: Convert to fraction form
    1,278,463,399.80/1,917,695,099.70 = 865,214,878.20/x
  3. Step 3: Cross multiply
    1,278,463,399.80x = 1,917,695,099.70 × 865,214,878.20
  4. Step 4: Simplify right side
    1,278,463,399.80x = 1,659,218,332,111,672,576
  5. Step 5: Solve for x
    x = 1,659,218,332,111,672,576/1,278,463,399.80
  6. Step 6: Final answer
    x = 1,297,822,317.30

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1.5x scale

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.