Finding the Fourth Proportional to 421,987.12, 633,036.26 and 137,577.79
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Solution
The fourth proportional to 421,987.12, 633,036.26 and 137,577.79 is: 206,384.81
Step by Step Solution
- Step 1: Write the proportion equation
421,987.12 : 633,036.26 = 137,577.79 : x - Step 2: Convert to fraction form
421,987.12/633,036.26 = 137,577.79/x - Step 3: Cross multiply
421,987.12x = 633,036.26 × 137,577.79 - Step 4: Simplify right side
421,987.12x = 87,091,730,775.91 - Step 5: Solve for x
x = 87,091,730,775.91/421,987.12 - Step 6: Final answer
x = 206,384.81
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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.