Finding the Fourth Proportional to 1,938,965,652.70, 2,909,293,617.93 and 679,333,418.08
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Solution
The fourth proportional to 1,938,965,652.70, 2,909,293,617.93 and 679,333,418.08 is: 1,019,296,228.85
Step by Step Solution
- Step 1: Write the proportion equation
1,938,965,652.70 : 2,909,293,617.93 = 679,333,418.08 : x - Step 2: Convert to fraction form
1,938,965,652.70/2,909,293,617.93 = 679,333,418.08/x - Step 3: Cross multiply
1,938,965,652.70x = 2,909,293,617.93 × 679,333,418.08 - Step 4: Simplify right side
1,938,965,652.70x = 1,976,380,377,666,716,416 - Step 5: Solve for x
x = 1,976,380,377,666,716,416/1,938,965,652.70 - Step 6: Final answer
x = 1,019,296,228.85
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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.