Home / 1,305,786,012.40-1,956,128,101.80-786,674,443.60

Finding the Fourth Proportional to 1,305,786,012.40, 1,956,128,101.80 and 786,674,443.60

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Solution

The fourth proportional to 1,305,786,012.40, 1,956,128,101.80 and 786,674,443.60 is: 1,178,474,858.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305,786,012.40 : 1,956,128,101.80 = 786,674,443.60 : x
  2. Step 2: Convert to fraction form
    1,305,786,012.40/1,956,128,101.80 = 786,674,443.60/x
  3. Step 3: Cross multiply
    1,305,786,012.40x = 1,956,128,101.80 × 786,674,443.60
  4. Step 4: Simplify right side
    1,305,786,012.40x = 1,538,835,986,093,839,104
  5. Step 5: Solve for x
    x = 1,538,835,986,093,839,104/1,305,786,012.40
  6. Step 6: Final answer
    x = 1,178,474,858.42

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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.