Finding the Fourth Proportional to 643,862,403.88, 888,722,799.72 and 376,010,488.09
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Solution
The fourth proportional to 643,862,403.88, 888,722,799.72 and 376,010,488.09 is: 519,006,998.52
Step by Step Solution
- Step 1: Write the proportion equation
643,862,403.88 : 888,722,799.72 = 376,010,488.09 : x - Step 2: Convert to fraction form
643,862,403.88/888,722,799.72 = 376,010,488.09/x - Step 3: Cross multiply
643,862,403.88x = 888,722,799.72 × 376,010,488.09 - Step 4: Simplify right side
643,862,403.88x = 334,169,093,699,428,480 - Step 5: Solve for x
x = 334,169,093,699,428,480/643,862,403.88 - Step 6: Final answer
x = 519,006,998.52
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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.