Finding the Fourth Proportional to 715,431.40, 987,274.74 and 405,305.08
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Solution
The fourth proportional to 715,431.40, 987,274.74 and 405,305.08 is: 559,309.34
Step by Step Solution
- Step 1: Write the proportion equation
715,431.40 : 987,274.74 = 405,305.08 : x - Step 2: Convert to fraction form
715,431.40/987,274.74 = 405,305.08/x - Step 3: Cross multiply
715,431.40x = 987,274.74 × 405,305.08 - Step 4: Simplify right side
715,431.40x = 400,147,467,477.68 - Step 5: Solve for x
x = 400,147,467,477.68/715,431.40 - Step 6: Final answer
x = 559,309.34
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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.