Finding the Fourth Proportional to 692,129.40, 1,038,194.10 and 218,959.80
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Solution
The fourth proportional to 692,129.40, 1,038,194.10 and 218,959.80 is: 328,439.70
Step by Step Solution
- Step 1: Write the proportion equation
692,129.40 : 1,038,194.10 = 218,959.80 : x - Step 2: Convert to fraction form
692,129.40/1,038,194.10 = 218,959.80/x - Step 3: Cross multiply
692,129.40x = 1,038,194.10 × 218,959.80 - Step 4: Simplify right side
692,129.40x = 227,322,772,497.18 - Step 5: Solve for x
x = 227,322,772,497.18/692,129.40 - Step 6: Final answer
x = 328,439.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.