Finding the Fourth Proportional to 438,413.63, 657,639.58 and 138,916.28
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Solution
The fourth proportional to 438,413.63, 657,639.58 and 138,916.28 is: 208,380.49
Step by Step Solution
- Step 1: Write the proportion equation
438,413.63 : 657,639.58 = 138,916.28 : x - Step 2: Convert to fraction form
438,413.63/657,639.58 = 138,916.28/x - Step 3: Cross multiply
438,413.63x = 657,639.58 × 138,916.28 - Step 4: Simplify right side
438,413.63x = 91,356,845,331.17 - Step 5: Solve for x
x = 91,356,845,331.17/438,413.63 - Step 6: Final answer
x = 208,380.49
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1.5x scale
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.