Finding the Fourth Proportional to 715,555.67, 987,490.61 and 421,152.03
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Solution
The fourth proportional to 715,555.67, 987,490.61 and 421,152.03 is: 581,203.80
Step by Step Solution
- Step 1: Write the proportion equation
715,555.67 : 987,490.61 = 421,152.03 : x - Step 2: Convert to fraction form
715,555.67/987,490.61 = 421,152.03/x - Step 3: Cross multiply
715,555.67x = 987,490.61 × 421,152.03 - Step 4: Simplify right side
715,555.67x = 415,883,675,684.10 - Step 5: Solve for x
x = 415,883,675,684.10/715,555.67 - Step 6: Final answer
x = 581,203.80
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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.