Finding the Fourth Proportional to 640,985.29, 884,832.07 and 399,387.23
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Solution
The fourth proportional to 640,985.29, 884,832.07 and 399,387.23 is: 551,324.09
Step by Step Solution
- Step 1: Write the proportion equation
640,985.29 : 884,832.07 = 399,387.23 : x - Step 2: Convert to fraction form
640,985.29/884,832.07 = 399,387.23/x - Step 3: Cross multiply
640,985.29x = 884,832.07 × 399,387.23 - Step 4: Simplify right side
640,985.29x = 353,390,633,073.99 - Step 5: Solve for x
x = 353,390,633,073.99/640,985.29 - Step 6: Final answer
x = 551,324.09
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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.