Finding the Fourth Proportional to 640,985.68, 884,832.60 and 399,387.62
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Solution
The fourth proportional to 640,985.68, 884,832.60 and 399,387.62 is: 551,324.62
Step by Step Solution
- Step 1: Write the proportion equation
640,985.68 : 884,832.60 = 399,387.62 : x - Step 2: Convert to fraction form
640,985.68/884,832.60 = 399,387.62/x - Step 3: Cross multiply
640,985.68x = 884,832.60 × 399,387.62 - Step 4: Simplify right side
640,985.68x = 353,391,186,212.41 - Step 5: Solve for x
x = 353,391,186,212.41/640,985.68 - Step 6: Final answer
x = 551,324.62
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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.