Finding the Fourth Proportional to 257,625.20, 386,437.80 and 210,930.80
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Solution
The fourth proportional to 257,625.20, 386,437.80 and 210,930.80 is: 316,396.20
Step by Step Solution
- Step 1: Write the proportion equation
257,625.20 : 386,437.80 = 210,930.80 : x - Step 2: Convert to fraction form
257,625.20/386,437.80 = 210,930.80/x - Step 3: Cross multiply
257,625.20x = 386,437.80 × 210,930.80 - Step 4: Simplify right side
257,625.20x = 81,511,634,304.24 - Step 5: Solve for x
x = 81,511,634,304.24/257,625.20 - Step 6: Final answer
x = 316,396.20
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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.