Finding the Fourth Proportional to 355,357.47, 490,246.79 and 247,989.81
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Solution
The fourth proportional to 355,357.47, 490,246.79 and 247,989.81 is: 342,123.68
Step by Step Solution
- Step 1: Write the proportion equation
355,357.47 : 490,246.79 = 247,989.81 : x - Step 2: Convert to fraction form
355,357.47/490,246.79 = 247,989.81/x - Step 3: Cross multiply
355,357.47x = 490,246.79 × 247,989.81 - Step 4: Simplify right side
355,357.47x = 121,576,207,065.26 - Step 5: Solve for x
x = 121,576,207,065.26/355,357.47 - Step 6: Final answer
x = 342,123.68
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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.