Finding the Fourth Proportional to 389,128.60, 536,990.26 and 219,362.84
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Solution
The fourth proportional to 389,128.60, 536,990.26 and 219,362.84 is: 302,716.66
Step by Step Solution
- Step 1: Write the proportion equation
389,128.60 : 536,990.26 = 219,362.84 : x - Step 2: Convert to fraction form
389,128.60/536,990.26 = 219,362.84/x - Step 3: Cross multiply
389,128.60x = 536,990.26 × 219,362.84 - Step 4: Simplify right side
389,128.60x = 117,795,708,485.94 - Step 5: Solve for x
x = 117,795,708,485.94/389,128.60 - Step 6: Final answer
x = 302,716.66
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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.