Finding the Fourth Proportional to 259,691.58, 389,508.21 and 72,717.66
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Solution
The fourth proportional to 259,691.58, 389,508.21 and 72,717.66 is: 109,068.32
Step by Step Solution
- Step 1: Write the proportion equation
259,691.58 : 389,508.21 = 72,717.66 : x - Step 2: Convert to fraction form
259,691.58/389,508.21 = 72,717.66/x - Step 3: Cross multiply
259,691.58x = 389,508.21 × 72,717.66 - Step 4: Simplify right side
259,691.58x = 28,324,125,581.99 - Step 5: Solve for x
x = 28,324,125,581.99/259,691.58 - Step 6: Final answer
x = 109,068.32
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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.