Finding the Fourth Proportional to 397,472,136.98, 548,485,123.10 and 221,255,601.57
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Solution
The fourth proportional to 397,472,136.98, 548,485,123.10 and 221,255,601.57 is: 305,318,019.99
Step by Step Solution
- Step 1: Write the proportion equation
397,472,136.98 : 548,485,123.10 = 221,255,601.57 : x - Step 2: Convert to fraction form
397,472,136.98/548,485,123.10 = 221,255,601.57/x - Step 3: Cross multiply
397,472,136.98x = 548,485,123.10 × 221,255,601.57 - Step 4: Simplify right side
397,472,136.98x = 121,355,405,862,579,728 - Step 5: Solve for x
x = 121,355,405,862,579,728/397,472,136.98 - Step 6: Final answer
x = 305,318,019.99
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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.