Finding the Fourth Proportional to 521,126.20, 781,106.10 and 221,555.80
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Solution
The fourth proportional to 521,126.20, 781,106.10 and 221,555.80 is: 332,085.75
Step by Step Solution
- Step 1: Write the proportion equation
521,126.20 : 781,106.10 = 221,555.80 : x - Step 2: Convert to fraction form
521,126.20/781,106.10 = 221,555.80/x - Step 3: Cross multiply
521,126.20x = 781,106.10 × 221,555.80 - Step 4: Simplify right side
521,126.20x = 173,058,586,870.38 - Step 5: Solve for x
x = 173,058,586,870.38/521,126.20 - Step 6: Final answer
x = 332,085.75
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.