Finding the Fourth Proportional to 644,312.21, 889,044.09 and 372,405.47
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Solution
The fourth proportional to 644,312.21, 889,044.09 and 372,405.47 is: 513,857.84
Step by Step Solution
- Step 1: Write the proportion equation
644,312.21 : 889,044.09 = 372,405.47 : x - Step 2: Convert to fraction form
644,312.21/889,044.09 = 372,405.47/x - Step 3: Cross multiply
644,312.21x = 889,044.09 × 372,405.47 - Step 4: Simplify right side
644,312.21x = 331,084,876,345.43 - Step 5: Solve for x
x = 331,084,876,345.43/644,312.21 - Step 6: Final answer
x = 513,857.84
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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.