Finding the Fourth Proportional to 721,742.76, 996,006.90 and 399,475.08
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Solution
The fourth proportional to 721,742.76, 996,006.90 and 399,475.08 is: 551,276.66
Step by Step Solution
- Step 1: Write the proportion equation
721,742.76 : 996,006.90 = 399,475.08 : x - Step 2: Convert to fraction form
721,742.76/996,006.90 = 399,475.08/x - Step 3: Cross multiply
721,742.76x = 996,006.90 × 399,475.08 - Step 4: Simplify right side
721,742.76x = 397,879,936,058.05 - Step 5: Solve for x
x = 397,879,936,058.05/721,742.76 - Step 6: Final answer
x = 551,276.66
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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.