Finding the Fourth Proportional to 640,478.26, 883,828.21 and 353,990.98
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Solution
The fourth proportional to 640,478.26, 883,828.21 and 353,990.98 is: 488,489.98
Step by Step Solution
- Step 1: Write the proportion equation
640,478.26 : 883,828.21 = 353,990.98 : x - Step 2: Convert to fraction form
640,478.26/883,828.21 = 353,990.98/x - Step 3: Cross multiply
640,478.26x = 883,828.21 × 353,990.98 - Step 4: Simplify right side
640,478.26x = 312,867,208,020.45 - Step 5: Solve for x
x = 312,867,208,020.45/640,478.26 - Step 6: Final answer
x = 488,489.98
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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.