Finding the Fourth Proportional to 644,305.13, 889,089.23 and 372,390.63
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Solution
The fourth proportional to 644,305.13, 889,089.23 and 372,390.63 is: 513,869.10
Step by Step Solution
- Step 1: Write the proportion equation
644,305.13 : 889,089.23 = 372,390.63 : x - Step 2: Convert to fraction form
644,305.13/889,089.23 = 372,390.63/x - Step 3: Cross multiply
644,305.13x = 889,089.23 × 372,390.63 - Step 4: Simplify right side
644,305.13x = 331,088,496,623.96 - Step 5: Solve for x
x = 331,088,496,623.96/644,305.13 - Step 6: Final answer
x = 513,869.10
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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.