Finding the Fourth Proportional to 687,289,189.48, 948,490,313.82 and 405,043,542.52
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Solution
The fourth proportional to 687,289,189.48, 948,490,313.82 and 405,043,542.52 is: 558,978,494.99
Step by Step Solution
- Step 1: Write the proportion equation
687,289,189.48 : 948,490,313.82 = 405,043,542.52 : x - Step 2: Convert to fraction form
687,289,189.48/948,490,313.82 = 405,043,542.52/x - Step 3: Cross multiply
687,289,189.48x = 948,490,313.82 × 405,043,542.52 - Step 4: Simplify right side
687,289,189.48x = 384,179,876,755,559,296 - Step 5: Solve for x
x = 384,179,876,755,559,296/687,289,189.48 - Step 6: Final answer
x = 558,978,494.99
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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.