Finding the Fourth Proportional to 420,633.12, 580,450.96 and 239,339.68
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Solution
The fourth proportional to 420,633.12, 580,450.96 and 239,339.68 is: 330,275.82
Step by Step Solution
- Step 1: Write the proportion equation
420,633.12 : 580,450.96 = 239,339.68 : x - Step 2: Convert to fraction form
420,633.12/580,450.96 = 239,339.68/x - Step 3: Cross multiply
420,633.12x = 580,450.96 × 239,339.68 - Step 4: Simplify right side
420,633.12x = 138,924,947,022.09 - Step 5: Solve for x
x = 138,924,947,022.09/420,633.12 - Step 6: Final answer
x = 330,275.82
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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.