Finding the Fourth Proportional to 420,639.09, 580,478.94 and 229,652.48
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Solution
The fourth proportional to 420,639.09, 580,478.94 and 229,652.48 is: 316,918.78
Step by Step Solution
- Step 1: Write the proportion equation
420,639.09 : 580,478.94 = 229,652.48 : x - Step 2: Convert to fraction form
420,639.09/580,478.94 = 229,652.48/x - Step 3: Cross multiply
420,639.09x = 580,478.94 × 229,652.48 - Step 4: Simplify right side
420,639.09x = 133,308,425,256.38 - Step 5: Solve for x
x = 133,308,425,256.38/420,639.09 - Step 6: Final answer
x = 316,918.78
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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.