Finding the Fourth Proportional to 665,309.09, 918,135.41 and 378,830.32
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Solution
The fourth proportional to 665,309.09, 918,135.41 and 378,830.32 is: 522,790.88
Step by Step Solution
- Step 1: Write the proportion equation
665,309.09 : 918,135.41 = 378,830.32 : x - Step 2: Convert to fraction form
665,309.09/918,135.41 = 378,830.32/x - Step 3: Cross multiply
665,309.09x = 918,135.41 × 378,830.32 - Step 4: Simplify right side
665,309.09x = 347,817,526,984.14 - Step 5: Solve for x
x = 347,817,526,984.14/665,309.09 - Step 6: Final answer
x = 522,790.88
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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.