Finding the Fourth Proportional to 911,498.25, 1,257,999.36 and 543,990.99
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Solution
The fourth proportional to 911,498.25, 1,257,999.36 and 543,990.99 is: 750,786.21
Step by Step Solution
- Step 1: Write the proportion equation
911,498.25 : 1,257,999.36 = 543,990.99 : x - Step 2: Convert to fraction form
911,498.25/1,257,999.36 = 543,990.99/x - Step 3: Cross multiply
911,498.25x = 1,257,999.36 × 543,990.99 - Step 4: Simplify right side
911,498.25x = 684,340,312,867.05 - Step 5: Solve for x
x = 684,340,312,867.05/911,498.25 - Step 6: Final answer
x = 750,786.21
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1.5x scale
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.