Finding the Fourth Proportional to 812,780.80, 1,121,531.24 and 468,629.62
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Solution
The fourth proportional to 812,780.80, 1,121,531.24 and 468,629.62 is: 646,647.61
Step by Step Solution
- Step 1: Write the proportion equation
812,780.80 : 1,121,531.24 = 468,629.62 : x - Step 2: Convert to fraction form
812,780.80/1,121,531.24 = 468,629.62/x - Step 3: Cross multiply
812,780.80x = 1,121,531.24 × 468,629.62 - Step 4: Simplify right side
812,780.80x = 525,582,758,819.33 - Step 5: Solve for x
x = 525,582,758,819.33/812,780.80 - Step 6: Final answer
x = 646,647.61
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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.