Home / 1,238,800,820.40-1,858,201,230.60-687,802,791.60

Finding the Fourth Proportional to 1,238,800,820.40, 1,858,201,230.60 and 687,802,791.60

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Solution

The fourth proportional to 1,238,800,820.40, 1,858,201,230.60 and 687,802,791.60 is: 1,031,704,187.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,800,820.40 : 1,858,201,230.60 = 687,802,791.60 : x
  2. Step 2: Convert to fraction form
    1,238,800,820.40/1,858,201,230.60 = 687,802,791.60/x
  3. Step 3: Cross multiply
    1,238,800,820.40x = 1,858,201,230.60 × 687,802,791.60
  4. Step 4: Simplify right side
    1,238,800,820.40x = 1,278,075,993,761,235,200
  5. Step 5: Solve for x
    x = 1,278,075,993,761,235,200/1,238,800,820.40
  6. Step 6: Final answer
    x = 1,031,704,187.40

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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.