Finding the Fourth Proportional to 257,869.48, 386,957.58 and 139,538.44
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Solution
The fourth proportional to 257,869.48, 386,957.58 and 139,538.44 is: 209,390.65
Step by Step Solution
- Step 1: Write the proportion equation
257,869.48 : 386,957.58 = 139,538.44 : x - Step 2: Convert to fraction form
257,869.48/386,957.58 = 139,538.44/x - Step 3: Cross multiply
257,869.48x = 386,957.58 × 139,538.44 - Step 4: Simplify right side
257,869.48x = 53,995,457,059.38 - Step 5: Solve for x
x = 53,995,457,059.38/257,869.48 - Step 6: Final answer
x = 209,390.65
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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.