Home / 1,328,584,987.20-1,992,877,480.80-638,325,796.80

Finding the Fourth Proportional to 1,328,584,987.20, 1,992,877,480.80 and 638,325,796.80

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Solution

The fourth proportional to 1,328,584,987.20, 1,992,877,480.80 and 638,325,796.80 is: 957,488,695.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,584,987.20 : 1,992,877,480.80 = 638,325,796.80 : x
  2. Step 2: Convert to fraction form
    1,328,584,987.20/1,992,877,480.80 = 638,325,796.80/x
  3. Step 3: Cross multiply
    1,328,584,987.20x = 1,992,877,480.80 × 638,325,796.80
  4. Step 4: Simplify right side
    1,328,584,987.20x = 1,272,105,105,856,436,480
  5. Step 5: Solve for x
    x = 1,272,105,105,856,436,480/1,328,584,987.20
  6. Step 6: Final answer
    x = 957,488,695.20

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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.