Finding the Fourth Proportional to 663,636.79, 915,819.69 and 361,830.79
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Solution
The fourth proportional to 663,636.79, 915,819.69 and 361,830.79 is: 499,326.99
Step by Step Solution
- Step 1: Write the proportion equation
663,636.79 : 915,819.69 = 361,830.79 : x - Step 2: Convert to fraction form
663,636.79/915,819.69 = 361,830.79/x - Step 3: Cross multiply
663,636.79x = 915,819.69 × 361,830.79 - Step 4: Simplify right side
663,636.79x = 331,371,761,930.26 - Step 5: Solve for x
x = 331,371,761,930.26/663,636.79 - Step 6: Final answer
x = 499,326.99
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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.