Finding the Fourth Proportional to 257,539.05, 386,414.86 and 139,070.88
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Solution
The fourth proportional to 257,539.05, 386,414.86 and 139,070.88 is: 208,663.71
Step by Step Solution
- Step 1: Write the proportion equation
257,539.05 : 386,414.86 = 139,070.88 : x - Step 2: Convert to fraction form
257,539.05/386,414.86 = 139,070.88/x - Step 3: Cross multiply
257,539.05x = 386,414.86 × 139,070.88 - Step 4: Simplify right side
257,539.05x = 53,739,052,693.20 - Step 5: Solve for x
x = 53,739,052,693.20/257,539.05 - Step 6: Final answer
x = 208,663.71
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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.