Finding the Fourth Proportional to 721,828.13, 996,385.68 and 420,022.13
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Solution
The fourth proportional to 721,828.13, 996,385.68 and 420,022.13 is: 579,783.49
Step by Step Solution
- Step 1: Write the proportion equation
721,828.13 : 996,385.68 = 420,022.13 : x - Step 2: Convert to fraction form
721,828.13/996,385.68 = 420,022.13/x - Step 3: Cross multiply
721,828.13x = 996,385.68 × 420,022.13 - Step 4: Simplify right side
721,828.13x = 418,504,030,633.17 - Step 5: Solve for x
x = 418,504,030,633.17/721,828.13 - Step 6: Final answer
x = 579,783.49
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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.