Finding the Fourth Proportional to 310,472.10, 428,491.11 and 189,587.94
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Solution
The fourth proportional to 310,472.10, 428,491.11 and 189,587.94 is: 261,655.55
Step by Step Solution
- Step 1: Write the proportion equation
310,472.10 : 428,491.11 = 189,587.94 : x - Step 2: Convert to fraction form
310,472.10/428,491.11 = 189,587.94/x - Step 3: Cross multiply
310,472.10x = 428,491.11 × 189,587.94 - Step 4: Simplify right side
310,472.10x = 81,236,746,853.21 - Step 5: Solve for x
x = 81,236,746,853.21/310,472.10 - Step 6: Final answer
x = 261,655.55
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1.5x scale
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.