Finding the Fourth Proportional to 388,420,374.47, 536,020,331.81 and 209,804,261.96
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Solution
The fourth proportional to 388,420,374.47, 536,020,331.81 and 209,804,261.96 is: 289,529,997.65
Step by Step Solution
- Step 1: Write the proportion equation
388,420,374.47 : 536,020,331.81 = 209,804,261.96 : x - Step 2: Convert to fraction form
388,420,374.47/536,020,331.81 = 209,804,261.96/x - Step 3: Cross multiply
388,420,374.47x = 536,020,331.81 × 209,804,261.96 - Step 4: Simplify right side
388,420,374.47x = 112,459,350,107,222,240 - Step 5: Solve for x
x = 112,459,350,107,222,240/388,420,374.47 - Step 6: Final answer
x = 289,529,997.65
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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.