Finding the Fourth Proportional to 640,431.65, 884,203.23 and 399,068.87
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Solution
The fourth proportional to 640,431.65, 884,203.23 and 399,068.87 is: 550,968.99
Step by Step Solution
- Step 1: Write the proportion equation
640,431.65 : 884,203.23 = 399,068.87 : x - Step 2: Convert to fraction form
640,431.65/884,203.23 = 399,068.87/x - Step 3: Cross multiply
640,431.65x = 884,203.23 × 399,068.87 - Step 4: Simplify right side
640,431.65x = 352,857,979,425.43 - Step 5: Solve for x
x = 352,857,979,425.43/640,431.65 - Step 6: Final answer
x = 550,968.99
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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.