Home / 672,645,603.85-1,008,968,405.78-643,589,067.18

Finding the Fourth Proportional to 672,645,603.85, 1,008,968,405.78 and 643,589,067.18

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Solution

The fourth proportional to 672,645,603.85, 1,008,968,405.78 and 643,589,067.18 is: 965,383,600.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,645,603.85 : 1,008,968,405.78 = 643,589,067.18 : x
  2. Step 2: Convert to fraction form
    672,645,603.85/1,008,968,405.78 = 643,589,067.18/x
  3. Step 3: Cross multiply
    672,645,603.85x = 1,008,968,405.78 × 643,589,067.18
  4. Step 4: Simplify right side
    672,645,603.85x = 649,361,035,081,779,072
  5. Step 5: Solve for x
    x = 649,361,035,081,779,072/672,645,603.85
  6. Step 6: Final answer
    x = 965,383,600.76

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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.