Finding the Fourth Proportional to 378,187.58, 521,898.86 and 208,421.70
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Solution
The fourth proportional to 378,187.58, 521,898.86 and 208,421.70 is: 287,621.95
Step by Step Solution
- Step 1: Write the proportion equation
378,187.58 : 521,898.86 = 208,421.70 : x - Step 2: Convert to fraction form
378,187.58/521,898.86 = 208,421.70/x - Step 3: Cross multiply
378,187.58x = 521,898.86 × 208,421.70 - Step 4: Simplify right side
378,187.58x = 108,775,047,629.26 - Step 5: Solve for x
x = 108,775,047,629.26/378,187.58 - Step 6: Final answer
x = 287,621.95
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.