Finding the Fourth Proportional to 628,711.51, 867,153.99 and 399,069.31
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Solution
The fourth proportional to 628,711.51, 867,153.99 and 399,069.31 is: 550,418.66
Step by Step Solution
- Step 1: Write the proportion equation
628,711.51 : 867,153.99 = 399,069.31 : x - Step 2: Convert to fraction form
628,711.51/867,153.99 = 399,069.31/x - Step 3: Cross multiply
628,711.51x = 867,153.99 × 399,069.31 - Step 4: Simplify right side
628,711.51x = 346,054,544,453.05 - Step 5: Solve for x
x = 346,054,544,453.05/628,711.51 - Step 6: Final answer
x = 550,418.66
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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.