Finding the Fourth Proportional to 720,339.84, 994,128.84 and 398,112.84
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Solution
The fourth proportional to 720,339.84, 994,128.84 and 398,112.84 is: 549,428.80
Step by Step Solution
- Step 1: Write the proportion equation
720,339.84 : 994,128.84 = 398,112.84 : x - Step 2: Convert to fraction form
720,339.84/994,128.84 = 398,112.84/x - Step 3: Cross multiply
720,339.84x = 994,128.84 × 398,112.84 - Step 4: Simplify right side
720,339.84x = 395,775,455,818.31 - Step 5: Solve for x
x = 395,775,455,818.31/720,339.84 - Step 6: Final answer
x = 549,428.80
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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.