Finding the Fourth Proportional to 620,107.12, 855,159.96 and 405,431.20
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Solution
The fourth proportional to 620,107.12, 855,159.96 and 405,431.20 is: 559,110.70
Step by Step Solution
- Step 1: Write the proportion equation
620,107.12 : 855,159.96 = 405,431.20 : x - Step 2: Convert to fraction form
620,107.12/855,159.96 = 405,431.20/x - Step 3: Cross multiply
620,107.12x = 855,159.96 × 405,431.20 - Step 4: Simplify right side
620,107.12x = 346,708,528,774.75 - Step 5: Solve for x
x = 346,708,528,774.75/620,107.12 - Step 6: Final answer
x = 559,110.70
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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.