Finding the Fourth Proportional to 1,128,080.21, 1,691,278.76 and 678,695.79
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Solution
The fourth proportional to 1,128,080.21, 1,691,278.76 and 678,695.79 is: 1,017,537.37
Step by Step Solution
- Step 1: Write the proportion equation
1,128,080.21 : 1,691,278.76 = 678,695.79 : x - Step 2: Convert to fraction form
1,128,080.21/1,691,278.76 = 678,695.79/x - Step 3: Cross multiply
1,128,080.21x = 1,691,278.76 × 678,695.79 - Step 4: Simplify right side
1,128,080.21x = 1,147,863,774,128.42 - Step 5: Solve for x
x = 1,147,863,774,128.42/1,128,080.21 - Step 6: Final answer
x = 1,017,537.37
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.