Finding the Fourth Proportional to 421,107.36, 581,135.76 and 230,128.80
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Solution
The fourth proportional to 421,107.36, 581,135.76 and 230,128.80 is: 317,581.90
Step by Step Solution
- Step 1: Write the proportion equation
421,107.36 : 581,135.76 = 230,128.80 : x - Step 2: Convert to fraction form
421,107.36/581,135.76 = 230,128.80/x - Step 3: Cross multiply
421,107.36x = 581,135.76 × 230,128.80 - Step 4: Simplify right side
421,107.36x = 133,736,075,085.89 - Step 5: Solve for x
x = 133,736,075,085.89/421,107.36 - Step 6: Final answer
x = 317,581.90
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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.