Finding the Fourth Proportional to 311,802.74, 430,291.71 and 189,259.70
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Solution
The fourth proportional to 311,802.74, 430,291.71 and 189,259.70 is: 261,180.77
Step by Step Solution
- Step 1: Write the proportion equation
311,802.74 : 430,291.71 = 189,259.70 : x - Step 2: Convert to fraction form
311,802.74/430,291.71 = 189,259.70/x - Step 3: Cross multiply
311,802.74x = 430,291.71 × 189,259.70 - Step 4: Simplify right side
311,802.74x = 81,436,879,947.09 - Step 5: Solve for x
x = 81,436,879,947.09/311,802.74 - Step 6: Final answer
x = 261,180.77
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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.