Finding the Fourth Proportional to 663,283.25, 915,478.62 and 421,518.68
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Solution
The fourth proportional to 663,283.25, 915,478.62 and 421,518.68 is: 581,789.66
Step by Step Solution
- Step 1: Write the proportion equation
663,283.25 : 915,478.62 = 421,518.68 : x - Step 2: Convert to fraction form
663,283.25/915,478.62 = 421,518.68/x - Step 3: Cross multiply
663,283.25x = 915,478.62 × 421,518.68 - Step 4: Simplify right side
663,283.25x = 385,891,339,470.62 - Step 5: Solve for x
x = 385,891,339,470.62/663,283.25 - Step 6: Final answer
x = 581,789.66
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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.