Finding the Fourth Proportional to 319,421,121.44, 440,802,475.54 and 172,743,405.44
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Solution
The fourth proportional to 319,421,121.44, 440,802,475.54 and 172,743,405.44 is: 238,386,617.66
Step by Step Solution
- Step 1: Write the proportion equation
319,421,121.44 : 440,802,475.54 = 172,743,405.44 : x - Step 2: Convert to fraction form
319,421,121.44/440,802,475.54 = 172,743,405.44/x - Step 3: Cross multiply
319,421,121.44x = 440,802,475.54 × 172,743,405.44 - Step 4: Simplify right side
319,421,121.44x = 76,145,720,748,526,032 - Step 5: Solve for x
x = 76,145,720,748,526,032/319,421,121.44 - Step 6: Final answer
x = 238,386,617.66
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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.