Finding the Fourth Proportional to 378,980.99, 568,394.62 and 139,013.21
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Solution
The fourth proportional to 378,980.99, 568,394.62 and 139,013.21 is: 208,491.62
Step by Step Solution
- Step 1: Write the proportion equation
378,980.99 : 568,394.62 = 139,013.21 : x - Step 2: Convert to fraction form
378,980.99/568,394.62 = 139,013.21/x - Step 3: Cross multiply
378,980.99x = 568,394.62 × 139,013.21 - Step 4: Simplify right side
378,980.99x = 79,014,361,746.38 - Step 5: Solve for x
x = 79,014,361,746.38/378,980.99 - Step 6: Final answer
x = 208,491.62
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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.