Finding the Fourth Proportional to 420,992.16, 581,135.40 and 259,912.32
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Solution
The fourth proportional to 420,992.16, 581,135.40 and 259,912.32 is: 358,781.62
Step by Step Solution
- Step 1: Write the proportion equation
420,992.16 : 581,135.40 = 259,912.32 : x - Step 2: Convert to fraction form
420,992.16/581,135.40 = 259,912.32/x - Step 3: Cross multiply
420,992.16x = 581,135.40 × 259,912.32 - Step 4: Simplify right side
420,992.16x = 151,044,250,048.13 - Step 5: Solve for x
x = 151,044,250,048.13/420,992.16 - Step 6: Final answer
x = 358,781.62
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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.