Finding the Fourth Proportional to 812,489.24, 1,218,011.12 and 385,761.80
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Solution
The fourth proportional to 812,489.24, 1,218,011.12 and 385,761.80 is: 578,299.55
Step by Step Solution
- Step 1: Write the proportion equation
812,489.24 : 1,218,011.12 = 385,761.80 : x - Step 2: Convert to fraction form
812,489.24/1,218,011.12 = 385,761.80/x - Step 3: Cross multiply
812,489.24x = 1,218,011.12 × 385,761.80 - Step 4: Simplify right side
812,489.24x = 469,862,162,071.22 - Step 5: Solve for x
x = 469,862,162,071.22/812,489.24 - Step 6: Final answer
x = 578,299.55
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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.