Home / 1,279,419,009.80-1,919,128,500.30-310,070,625.80

Finding the Fourth Proportional to 1,279,419,009.80, 1,919,128,500.30 and 310,070,625.80

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Solution

The fourth proportional to 1,279,419,009.80, 1,919,128,500.30 and 310,070,625.80 is: 465,105,935.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,419,009.80 : 1,919,128,500.30 = 310,070,625.80 : x
  2. Step 2: Convert to fraction form
    1,279,419,009.80/1,919,128,500.30 = 310,070,625.80/x
  3. Step 3: Cross multiply
    1,279,419,009.80x = 1,919,128,500.30 × 310,070,625.80
  4. Step 4: Simplify right side
    1,279,419,009.80x = 595,065,375,078,636,544
  5. Step 5: Solve for x
    x = 595,065,375,078,636,544/1,279,419,009.80
  6. Step 6: Final answer
    x = 465,105,935.21

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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.