Finding the Fourth Proportional to 420,612.36, 580,478.18 and 239,331.92
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Solution
The fourth proportional to 420,612.36, 580,478.18 and 239,331.92 is: 330,296.90
Step by Step Solution
- Step 1: Write the proportion equation
420,612.36 : 580,478.18 = 239,331.92 : x - Step 2: Convert to fraction form
420,612.36/580,478.18 = 239,331.92/x - Step 3: Cross multiply
420,612.36x = 580,478.18 × 239,331.92 - Step 4: Simplify right side
420,612.36x = 138,926,957,337.51 - Step 5: Solve for x
x = 138,926,957,337.51/420,612.36 - Step 6: Final answer
x = 330,296.90
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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.