Finding the Fourth Proportional to 690,648.15, 1,035,186.63 and 420,180.08
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Solution
The fourth proportional to 690,648.15, 1,035,186.63 and 420,180.08 is: 629,792.18
Step by Step Solution
- Step 1: Write the proportion equation
690,648.15 : 1,035,186.63 = 420,180.08 : x - Step 2: Convert to fraction form
690,648.15/1,035,186.63 = 420,180.08/x - Step 3: Cross multiply
690,648.15x = 1,035,186.63 × 420,180.08 - Step 4: Simplify right side
690,648.15x = 434,964,798,349.94 - Step 5: Solve for x
x = 434,964,798,349.94/690,648.15 - Step 6: Final answer
x = 629,792.18
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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.