Home / 1,328,878,879.20-1,993,318,318.80-638,619,688.80

Finding the Fourth Proportional to 1,328,878,879.20, 1,993,318,318.80 and 638,619,688.80

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Solution

The fourth proportional to 1,328,878,879.20, 1,993,318,318.80 and 638,619,688.80 is: 957,929,533.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,878,879.20 : 1,993,318,318.80 = 638,619,688.80 : x
  2. Step 2: Convert to fraction form
    1,328,878,879.20/1,993,318,318.80 = 638,619,688.80/x
  3. Step 3: Cross multiply
    1,328,878,879.20x = 1,993,318,318.80 × 638,619,688.80
  4. Step 4: Simplify right side
    1,328,878,879.20x = 1,272,972,324,431,395,072
  5. Step 5: Solve for x
    x = 1,272,972,324,431,395,072/1,328,878,879.20
  6. Step 6: Final answer
    x = 957,929,533.20

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Double scale
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1.5x scale

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.