Finding the Fourth Proportional to 209,430.79, 289,114.87 and 128,927.32
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Solution
The fourth proportional to 209,430.79, 289,114.87 and 128,927.32 is: 177,981.50
Step by Step Solution
- Step 1: Write the proportion equation
209,430.79 : 289,114.87 = 128,927.32 : x - Step 2: Convert to fraction form
209,430.79/289,114.87 = 128,927.32/x - Step 3: Cross multiply
209,430.79x = 289,114.87 × 128,927.32 - Step 4: Simplify right side
209,430.79x = 37,274,805,683.57 - Step 5: Solve for x
x = 37,274,805,683.57/209,430.79 - Step 6: Final answer
x = 177,981.50
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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.