Finding the Fourth Proportional to 1,238,541.61, 1,857,366.70 and 428,705.99
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Solution
The fourth proportional to 1,238,541.61, 1,857,366.70 and 428,705.99 is: 642,904.71
Step by Step Solution
- Step 1: Write the proportion equation
1,238,541.61 : 1,857,366.70 = 428,705.99 : x - Step 2: Convert to fraction form
1,238,541.61/1,857,366.70 = 428,705.99/x - Step 3: Cross multiply
1,238,541.61x = 1,857,366.70 × 428,705.99 - Step 4: Simplify right side
1,238,541.61x = 796,264,235,095.83 - Step 5: Solve for x
x = 796,264,235,095.83/1,238,541.61 - Step 6: Final answer
x = 642,904.71
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.