Home / 1,328,879,429.70-1,993,319,144.55-638,620,239.30

Finding the Fourth Proportional to 1,328,879,429.70, 1,993,319,144.55 and 638,620,239.30

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Solution

The fourth proportional to 1,328,879,429.70, 1,993,319,144.55 and 638,620,239.30 is: 957,930,358.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,879,429.70 : 1,993,319,144.55 = 638,620,239.30 : x
  2. Step 2: Convert to fraction form
    1,328,879,429.70/1,993,319,144.55 = 638,620,239.30/x
  3. Step 3: Cross multiply
    1,328,879,429.70x = 1,993,319,144.55 × 638,620,239.30
  4. Step 4: Simplify right side
    1,328,879,429.70x = 1,272,973,949,093,792,256
  5. Step 5: Solve for x
    x = 1,272,973,949,093,792,256/1,328,879,429.70
  6. Step 6: Final answer
    x = 957,930,358.95

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Double scale
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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.