Finding the Fourth Proportional to 812,790.75, 1,121,638.50 and 445,264.95
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Solution
The fourth proportional to 812,790.75, 1,121,638.50 and 445,264.95 is: 614,458.65
Step by Step Solution
- Step 1: Write the proportion equation
812,790.75 : 1,121,638.50 = 445,264.95 : x - Step 2: Convert to fraction form
812,790.75/1,121,638.50 = 445,264.95/x - Step 3: Cross multiply
812,790.75x = 1,121,638.50 × 445,264.95 - Step 4: Simplify right side
812,790.75x = 499,426,310,620.58 - Step 5: Solve for x
x = 499,426,310,620.58/812,790.75 - Step 6: Final answer
x = 614,458.65
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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.