Finding the Fourth Proportional to 386,641.81, 580,386.93 and 307,190.44
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Solution
The fourth proportional to 386,641.81, 580,386.93 and 307,190.44 is: 461,122.70
Step by Step Solution
- Step 1: Write the proportion equation
386,641.81 : 580,386.93 = 307,190.44 : x - Step 2: Convert to fraction form
386,641.81/580,386.93 = 307,190.44/x - Step 3: Cross multiply
386,641.81x = 580,386.93 × 307,190.44 - Step 4: Simplify right side
386,641.81x = 178,289,316,396.95 - Step 5: Solve for x
x = 178,289,316,396.95/386,641.81 - Step 6: Final answer
x = 461,122.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.