Finding the Fourth Proportional to 715,198.97, 986,985.05 and 388,518.08
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Solution
The fourth proportional to 715,198.97, 986,985.05 and 388,518.08 is: 536,160.63
Step by Step Solution
- Step 1: Write the proportion equation
715,198.97 : 986,985.05 = 388,518.08 : x - Step 2: Convert to fraction form
715,198.97/986,985.05 = 388,518.08/x - Step 3: Cross multiply
715,198.97x = 986,985.05 × 388,518.08 - Step 4: Simplify right side
715,198.97x = 383,461,529,737.19 - Step 5: Solve for x
x = 383,461,529,737.19/715,198.97 - Step 6: Final answer
x = 536,160.63
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1.5x scale
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.