Finding the Fourth Proportional to 421,163.55, 631,678.50 and 136,860.84
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Solution
The fourth proportional to 421,163.55, 631,678.50 and 136,860.84 is: 205,269.54
Step by Step Solution
- Step 1: Write the proportion equation
421,163.55 : 631,678.50 = 136,860.84 : x - Step 2: Convert to fraction form
421,163.55/631,678.50 = 136,860.84/x - Step 3: Cross multiply
421,163.55x = 631,678.50 × 136,860.84 - Step 4: Simplify right side
421,163.55x = 86,452,050,119.94 - Step 5: Solve for x
x = 86,452,050,119.94/421,163.55 - Step 6: Final answer
x = 205,269.54
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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.