Home / 1,290,385,164.80-1,935,584,745.60-321,036,780.80

Finding the Fourth Proportional to 1,290,385,164.80, 1,935,584,745.60 and 321,036,780.80

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Solution

The fourth proportional to 1,290,385,164.80, 1,935,584,745.60 and 321,036,780.80 is: 481,556,912.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,385,164.80 : 1,935,584,745.60 = 321,036,780.80 : x
  2. Step 2: Convert to fraction form
    1,290,385,164.80/1,935,584,745.60 = 321,036,780.80/x
  3. Step 3: Cross multiply
    1,290,385,164.80x = 1,935,584,745.60 × 321,036,780.80
  4. Step 4: Simplify right side
    1,290,385,164.80x = 621,393,895,693,010,944
  5. Step 5: Solve for x
    x = 621,393,895,693,010,944/1,290,385,164.80
  6. Step 6: Final answer
    x = 481,556,912.34

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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.