Finding the Fourth Proportional to 520,809.40, 781,214.10 and 515,279.80
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Solution
The fourth proportional to 520,809.40, 781,214.10 and 515,279.80 is: 772,919.70
Step by Step Solution
- Step 1: Write the proportion equation
520,809.40 : 781,214.10 = 515,279.80 : x - Step 2: Convert to fraction form
520,809.40/781,214.10 = 515,279.80/x - Step 3: Cross multiply
520,809.40x = 781,214.10 × 515,279.80 - Step 4: Simplify right side
520,809.40x = 402,543,845,205.18 - Step 5: Solve for x
x = 402,543,845,205.18/520,809.40 - Step 6: Final answer
x = 772,919.70
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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.