Finding the Fourth Proportional to 1,328,878,873.70, 1,993,318,310.55 and 638,619,683.30
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Solution
The fourth proportional to 1,328,878,873.70, 1,993,318,310.55 and 638,619,683.30 is: 957,929,524.95
Step by Step Solution
- Step 1: Write the proportion equation
1,328,878,873.70 : 1,993,318,310.55 = 638,619,683.30 : x - Step 2: Convert to fraction form
1,328,878,873.70/1,993,318,310.55 = 638,619,683.30/x - Step 3: Cross multiply
1,328,878,873.70x = 1,993,318,310.55 × 638,619,683.30 - Step 4: Simplify right side
1,328,878,873.70x = 1,272,972,308,199,532,032 - Step 5: Solve for x
x = 1,272,972,308,199,532,032/1,328,878,873.70 - Step 6: Final answer
x = 957,929,524.95
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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.