Finding the Fourth Proportional to 715,692.54, 987,644.60 and 393,395.70
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Solution
The fourth proportional to 715,692.54, 987,644.60 and 393,395.70 is: 542,879.96
Step by Step Solution
- Step 1: Write the proportion equation
715,692.54 : 987,644.60 = 393,395.70 : x - Step 2: Convert to fraction form
715,692.54/987,644.60 = 393,395.70/x - Step 3: Cross multiply
715,692.54x = 987,644.60 × 393,395.70 - Step 4: Simplify right side
715,692.54x = 388,535,136,801.24 - Step 5: Solve for x
x = 388,535,136,801.24/715,692.54 - Step 6: Final answer
x = 542,879.96
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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.