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Finding the Fourth Proportional to 1,318,767,239.20, 1,978,150,858.80 and 398,524,003.60

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Solution

The fourth proportional to 1,318,767,239.20, 1,978,150,858.80 and 398,524,003.60 is: 597,786,005.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,767,239.20 : 1,978,150,858.80 = 398,524,003.60 : x
  2. Step 2: Convert to fraction form
    1,318,767,239.20/1,978,150,858.80 = 398,524,003.60/x
  3. Step 3: Cross multiply
    1,318,767,239.20x = 1,978,150,858.80 × 398,524,003.60
  4. Step 4: Simplify right side
    1,318,767,239.20x = 788,340,599,973,754,368
  5. Step 5: Solve for x
    x = 788,340,599,973,754,368/1,318,767,239.20
  6. Step 6: Final answer
    x = 597,786,005.40

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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.