Finding the Fourth Proportional to 628,657.63, 867,714.39 and 387,142.70
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Solution
The fourth proportional to 628,657.63, 867,714.39 and 387,142.70 is: 534,359.68
Step by Step Solution
- Step 1: Write the proportion equation
628,657.63 : 867,714.39 = 387,142.70 : x - Step 2: Convert to fraction form
628,657.63/867,714.39 = 387,142.70/x - Step 3: Cross multiply
628,657.63x = 867,714.39 × 387,142.70 - Step 4: Simplify right side
628,657.63x = 335,929,287,434.88 - Step 5: Solve for x
x = 335,929,287,434.88/628,657.63 - Step 6: Final answer
x = 534,359.68
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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.