Finding the Fourth Proportional to 239,478.79, 330,528.58 and 137,574.21
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Solution
The fourth proportional to 239,478.79, 330,528.58 and 137,574.21 is: 189,879.90
Step by Step Solution
- Step 1: Write the proportion equation
239,478.79 : 330,528.58 = 137,574.21 : x - Step 2: Convert to fraction form
239,478.79/330,528.58 = 137,574.21/x - Step 3: Cross multiply
239,478.79x = 330,528.58 × 137,574.21 - Step 4: Simplify right side
239,478.79x = 45,472,207,621.57 - Step 5: Solve for x
x = 45,472,207,621.57/239,478.79 - Step 6: Final answer
x = 189,879.90
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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.