Finding the Fourth Proportional to 257,990.31, 386,971.80 and 80,476.99
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Solution
The fourth proportional to 257,990.31, 386,971.80 and 80,476.99 is: 120,711.22
Step by Step Solution
- Step 1: Write the proportion equation
257,990.31 : 386,971.80 = 80,476.99 : x - Step 2: Convert to fraction form
257,990.31/386,971.80 = 80,476.99/x - Step 3: Cross multiply
257,990.31x = 386,971.80 × 80,476.99 - Step 4: Simplify right side
257,990.31x = 31,142,324,409.66 - Step 5: Solve for x
x = 31,142,324,409.66/257,990.31 - Step 6: Final answer
x = 120,711.22
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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.