Finding the Fourth Proportional to 1,129,422,849.45, 1,558,641,336.11 and 627,652,781.70
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Solution
The fourth proportional to 1,129,422,849.45, 1,558,641,336.11 and 627,652,781.70 is: 866,181,847.44
Step by Step Solution
- Step 1: Write the proportion equation
1,129,422,849.45 : 1,558,641,336.11 = 627,652,781.70 : x - Step 2: Convert to fraction form
1,129,422,849.45/1,558,641,336.11 = 627,652,781.70/x - Step 3: Cross multiply
1,129,422,849.45x = 1,558,641,336.11 × 627,652,781.70 - Step 4: Simplify right side
1,129,422,849.45x = 978,285,570,278,908,032 - Step 5: Solve for x
x = 978,285,570,278,908,032/1,129,422,849.45 - Step 6: Final answer
x = 866,181,847.44
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.