Finding the Fourth Proportional to 620,107.62, 855,160.65 and 405,431.70
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Solution
The fourth proportional to 620,107.62, 855,160.65 and 405,431.70 is: 559,111.39
Step by Step Solution
- Step 1: Write the proportion equation
620,107.62 : 855,160.65 = 405,431.70 : x - Step 2: Convert to fraction form
620,107.62/855,160.65 = 405,431.70/x - Step 3: Cross multiply
620,107.62x = 855,160.65 × 405,431.70 - Step 4: Simplify right side
620,107.62x = 346,709,236,102.61 - Step 5: Solve for x
x = 346,709,236,102.61/620,107.62 - Step 6: Final answer
x = 559,111.39
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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.