Home / 1,278,463,338.30-1,917,695,007.45-865,214,816.70

Finding the Fourth Proportional to 1,278,463,338.30, 1,917,695,007.45 and 865,214,816.70

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Solution

The fourth proportional to 1,278,463,338.30, 1,917,695,007.45 and 865,214,816.70 is: 1,297,822,225.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,463,338.30 : 1,917,695,007.45 = 865,214,816.70 : x
  2. Step 2: Convert to fraction form
    1,278,463,338.30/1,917,695,007.45 = 865,214,816.70/x
  3. Step 3: Cross multiply
    1,278,463,338.30x = 1,917,695,007.45 × 865,214,816.70
  4. Step 4: Simplify right side
    1,278,463,338.30x = 1,659,218,134,357,357,056
  5. Step 5: Solve for x
    x = 1,659,218,134,357,357,056/1,278,463,338.30
  6. Step 6: Final answer
    x = 1,297,822,225.05

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Double scale
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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.