Finding the Fourth Proportional to 660,723.19, 911,720.64 and 388,731.26
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Solution
The fourth proportional to 660,723.19, 911,720.64 and 388,731.26 is: 536,403.63
Step by Step Solution
- Step 1: Write the proportion equation
660,723.19 : 911,720.64 = 388,731.26 : x - Step 2: Convert to fraction form
660,723.19/911,720.64 = 388,731.26/x - Step 3: Cross multiply
660,723.19x = 911,720.64 × 388,731.26 - Step 4: Simplify right side
660,723.19x = 354,414,316,892.25 - Step 5: Solve for x
x = 354,414,316,892.25/660,723.19 - Step 6: Final answer
x = 536,403.63
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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.