Home / 1,328,486,999.40-1,991,959,547.74-628,973,262.78

Finding the Fourth Proportional to 1,328,486,999.40, 1,991,959,547.74 and 628,973,262.78

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Solution

The fourth proportional to 1,328,486,999.40, 1,991,959,547.74 and 628,973,262.78 is: 943,094,886.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,486,999.40 : 1,991,959,547.74 = 628,973,262.78 : x
  2. Step 2: Convert to fraction form
    1,328,486,999.40/1,991,959,547.74 = 628,973,262.78/x
  3. Step 3: Cross multiply
    1,328,486,999.40x = 1,991,959,547.74 × 628,973,262.78
  4. Step 4: Simplify right side
    1,328,486,999.40x = 1,252,889,296,067,800,832
  5. Step 5: Solve for x
    x = 1,252,889,296,067,800,832/1,328,486,999.40
  6. Step 6: Final answer
    x = 943,094,886.61

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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.