Home / 1,238,800,743.40-1,858,201,115.10-687,802,714.60

Finding the Fourth Proportional to 1,238,800,743.40, 1,858,201,115.10 and 687,802,714.60

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Solution

The fourth proportional to 1,238,800,743.40, 1,858,201,115.10 and 687,802,714.60 is: 1,031,704,071.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,800,743.40 : 1,858,201,115.10 = 687,802,714.60 : x
  2. Step 2: Convert to fraction form
    1,238,800,743.40/1,858,201,115.10 = 687,802,714.60/x
  3. Step 3: Cross multiply
    1,238,800,743.40x = 1,858,201,115.10 × 687,802,714.60
  4. Step 4: Simplify right side
    1,238,800,743.40x = 1,278,075,771,238,526,976
  5. Step 5: Solve for x
    x = 1,278,075,771,238,526,976/1,238,800,743.40
  6. Step 6: Final answer
    x = 1,031,704,071.90

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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.