Finding the Fourth Proportional to 420,391.76, 580,158.05 and 239,135.63
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Solution
The fourth proportional to 420,391.76, 580,158.05 and 239,135.63 is: 330,017.07
Step by Step Solution
- Step 1: Write the proportion equation
420,391.76 : 580,158.05 = 239,135.63 : x - Step 2: Convert to fraction form
420,391.76/580,158.05 = 239,135.63/x - Step 3: Cross multiply
420,391.76x = 580,158.05 × 239,135.63 - Step 4: Simplify right side
420,391.76x = 138,736,456,689.85 - Step 5: Solve for x
x = 138,736,456,689.85/420,391.76 - Step 6: Final answer
x = 330,017.07
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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.