Home / 1,278,135,033.40-1,917,202,550.10-818,970,009.40

Finding the Fourth Proportional to 1,278,135,033.40, 1,917,202,550.10 and 818,970,009.40

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Solution

The fourth proportional to 1,278,135,033.40, 1,917,202,550.10 and 818,970,009.40 is: 1,228,455,014.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,135,033.40 : 1,917,202,550.10 = 818,970,009.40 : x
  2. Step 2: Convert to fraction form
    1,278,135,033.40/1,917,202,550.10 = 818,970,009.40/x
  3. Step 3: Cross multiply
    1,278,135,033.40x = 1,917,202,550.10 × 818,970,009.40
  4. Step 4: Simplify right side
    1,278,135,033.40x = 1,570,131,390,477,100,800
  5. Step 5: Solve for x
    x = 1,570,131,390,477,100,800/1,278,135,033.40
  6. Step 6: Final answer
    x = 1,228,455,014.10

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Double scale
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Similar ratio
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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.