Finding the Fourth Proportional to 428,841.19, 642,449.84 and 286,256.53
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Solution
The fourth proportional to 428,841.19, 642,449.84 and 286,256.53 is: 428,842.81
Step by Step Solution
- Step 1: Write the proportion equation
428,841.19 : 642,449.84 = 286,256.53 : x - Step 2: Convert to fraction form
428,841.19/642,449.84 = 286,256.53/x - Step 3: Cross multiply
428,841.19x = 642,449.84 × 286,256.53 - Step 4: Simplify right side
428,841.19x = 183,905,461,897.46 - Step 5: Solve for x
x = 183,905,461,897.46/428,841.19 - Step 6: Final answer
x = 428,842.81
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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.