Finding the Fourth Proportional to 420,387.20, 580,129.56 and 229,403.84
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Solution
The fourth proportional to 420,387.20, 580,129.56 and 229,403.84 is: 316,574.69
Step by Step Solution
- Step 1: Write the proportion equation
420,387.20 : 580,129.56 = 229,403.84 : x - Step 2: Convert to fraction form
420,387.20/580,129.56 = 229,403.84/x - Step 3: Cross multiply
420,387.20x = 580,129.56 × 229,403.84 - Step 4: Simplify right side
420,387.20x = 133,083,948,761.51 - Step 5: Solve for x
x = 133,083,948,761.51/420,387.20 - Step 6: Final answer
x = 316,574.69
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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.