Finding the Fourth Proportional to 338,940.10, 508,413.05 and 86,220.81
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Solution
The fourth proportional to 338,940.10, 508,413.05 and 86,220.81 is: 129,331.95
Step by Step Solution
- Step 1: Write the proportion equation
338,940.10 : 508,413.05 = 86,220.81 : x - Step 2: Convert to fraction form
338,940.10/508,413.05 = 86,220.81/x - Step 3: Cross multiply
338,940.10x = 508,413.05 × 86,220.81 - Step 4: Simplify right side
338,940.10x = 43,835,784,985.57 - Step 5: Solve for x
x = 43,835,784,985.57/338,940.10 - Step 6: Final answer
x = 129,331.95
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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.