Finding the Fourth Proportional to 718,781.98, 991,842.49 and 396,492.05
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Solution
The fourth proportional to 718,781.98, 991,842.49 and 396,492.05 is: 547,116.75
Step by Step Solution
- Step 1: Write the proportion equation
718,781.98 : 991,842.49 = 396,492.05 : x - Step 2: Convert to fraction form
718,781.98/991,842.49 = 396,492.05/x - Step 3: Cross multiply
718,781.98x = 991,842.49 × 396,492.05 - Step 4: Simplify right side
718,781.98x = 393,257,662,323.73 - Step 5: Solve for x
x = 393,257,662,323.73/718,781.98 - Step 6: Final answer
x = 547,116.75
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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.