Finding the Fourth Proportional to 290,307,916.80, 435,660,940.80 and 128,865,715.20
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Solution
The fourth proportional to 290,307,916.80, 435,660,940.80 and 128,865,715.20 is: 193,386,936.67
Step by Step Solution
- Step 1: Write the proportion equation
290,307,916.80 : 435,660,940.80 = 128,865,715.20 : x - Step 2: Convert to fraction form
290,307,916.80/435,660,940.80 = 128,865,715.20/x - Step 3: Cross multiply
290,307,916.80x = 435,660,940.80 × 128,865,715.20 - Step 4: Simplify right side
290,307,916.80x = 56,141,758,720,896,864 - Step 5: Solve for x
x = 56,141,758,720,896,864/290,307,916.80 - Step 6: Final answer
x = 193,386,936.67
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.