Finding the Fourth Proportional to 378,122.13, 521,806.05 and 208,356.30
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Solution
The fourth proportional to 378,122.13, 521,806.05 and 208,356.30 is: 287,530.32
Step by Step Solution
- Step 1: Write the proportion equation
378,122.13 : 521,806.05 = 208,356.30 : x - Step 2: Convert to fraction form
378,122.13/521,806.05 = 208,356.30/x - Step 3: Cross multiply
378,122.13x = 521,806.05 × 208,356.30 - Step 4: Simplify right side
378,122.13x = 108,721,577,895.62 - Step 5: Solve for x
x = 108,721,577,895.62/378,122.13 - Step 6: Final answer
x = 287,530.32
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1.5x scale
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.