Finding the Fourth Proportional to 391,163.58, 539,807.49 and 221,430.51
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Solution
The fourth proportional to 391,163.58, 539,807.49 and 221,430.51 is: 305,575.09
Step by Step Solution
- Step 1: Write the proportion equation
391,163.58 : 539,807.49 = 221,430.51 : x - Step 2: Convert to fraction form
391,163.58/539,807.49 = 221,430.51/x - Step 3: Cross multiply
391,163.58x = 539,807.49 × 221,430.51 - Step 4: Simplify right side
391,163.58x = 119,529,847,812.52 - Step 5: Solve for x
x = 119,529,847,812.52/391,163.58 - Step 6: Final answer
x = 305,575.09
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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.