Finding the Fourth Proportional to 305,428.26, 421,423.29 and 176,338.74
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Solution
The fourth proportional to 305,428.26, 421,423.29 and 176,338.74 is: 243,308.37
Step by Step Solution
- Step 1: Write the proportion equation
305,428.26 : 421,423.29 = 176,338.74 : x - Step 2: Convert to fraction form
305,428.26/421,423.29 = 176,338.74/x - Step 3: Cross multiply
305,428.26x = 421,423.29 × 176,338.74 - Step 4: Simplify right side
305,428.26x = 74,313,251,965.25 - Step 5: Solve for x
x = 74,313,251,965.25/305,428.26 - Step 6: Final answer
x = 243,308.37
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1.5x scale
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.