Finding the Fourth Proportional to 918,245.13, 1,376,578.84 and 319,128.45
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Solution
The fourth proportional to 918,245.13, 1,376,578.84 and 319,128.45 is: 478,418.52
Step by Step Solution
- Step 1: Write the proportion equation
918,245.13 : 1,376,578.84 = 319,128.45 : x - Step 2: Convert to fraction form
918,245.13/1,376,578.84 = 319,128.45/x - Step 3: Cross multiply
918,245.13x = 1,376,578.84 × 319,128.45 - Step 4: Simplify right side
918,245.13x = 439,305,471,512.00 - Step 5: Solve for x
x = 439,305,471,512.00/918,245.13 - Step 6: Final answer
x = 478,418.52
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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.