Finding the Fourth Proportional to 257,538.92, 386,414.67 and 139,070.75
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Solution
The fourth proportional to 257,538.92, 386,414.67 and 139,070.75 is: 208,663.52
Step by Step Solution
- Step 1: Write the proportion equation
257,538.92 : 386,414.67 = 139,070.75 : x - Step 2: Convert to fraction form
257,538.92/386,414.67 = 139,070.75/x - Step 3: Cross multiply
257,538.92x = 386,414.67 × 139,070.75 - Step 4: Simplify right side
257,538.92x = 53,738,977,967.90 - Step 5: Solve for x
x = 53,738,977,967.90/257,538.92 - Step 6: Final answer
x = 208,663.52
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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.