Finding the Fourth Proportional to 811,576.80, 1,217,365.20 and 390,751.20
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Solution
The fourth proportional to 811,576.80, 1,217,365.20 and 390,751.20 is: 586,126.80
Step by Step Solution
- Step 1: Write the proportion equation
811,576.80 : 1,217,365.20 = 390,751.20 : x - Step 2: Convert to fraction form
811,576.80/1,217,365.20 = 390,751.20/x - Step 3: Cross multiply
811,576.80x = 1,217,365.20 × 390,751.20 - Step 4: Simplify right side
811,576.80x = 475,686,912,738.24 - Step 5: Solve for x
x = 475,686,912,738.24/811,576.80 - Step 6: Final answer
x = 586,126.80
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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.