Finding the Fourth Proportional to 285,368,803.79, 393,810,964.77 and 154,988,611.79
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Solution
The fourth proportional to 285,368,803.79, 393,810,964.77 and 154,988,611.79 is: 213,885,378.94
Step by Step Solution
- Step 1: Write the proportion equation
285,368,803.79 : 393,810,964.77 = 154,988,611.79 : x - Step 2: Convert to fraction form
285,368,803.79/393,810,964.77 = 154,988,611.79/x - Step 3: Cross multiply
285,368,803.79x = 393,810,964.77 × 154,988,611.79 - Step 4: Simplify right side
285,368,803.79x = 61,036,214,737,382,888 - Step 5: Solve for x
x = 61,036,214,737,382,888/285,368,803.79 - Step 6: Final answer
x = 213,885,378.94
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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.