Finding the Fourth Proportional to 393,382,212.67, 542,853,233.49 and 217,166,431.81
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Solution
The fourth proportional to 393,382,212.67, 542,853,233.49 and 217,166,431.81 is: 299,681,825.75
Step by Step Solution
- Step 1: Write the proportion equation
393,382,212.67 : 542,853,233.49 = 217,166,431.81 : x - Step 2: Convert to fraction form
393,382,212.67/542,853,233.49 = 217,166,431.81/x - Step 3: Cross multiply
393,382,212.67x = 542,853,233.49 × 217,166,431.81 - Step 4: Simplify right side
393,382,212.67x = 117,889,499,710,829,840 - Step 5: Solve for x
x = 117,889,499,710,829,840/393,382,212.67 - Step 6: Final answer
x = 299,681,825.75
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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.