Finding the Fourth Proportional to 278,930.11, 384,921.63 and 151,605.70
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Solution
The fourth proportional to 278,930.11, 384,921.63 and 151,605.70 is: 209,214.82
Step by Step Solution
- Step 1: Write the proportion equation
278,930.11 : 384,921.63 = 151,605.70 : x - Step 2: Convert to fraction form
278,930.11/384,921.63 = 151,605.70/x - Step 3: Cross multiply
278,930.11x = 384,921.63 × 151,605.70 - Step 4: Simplify right side
278,930.11x = 58,356,313,161.29 - Step 5: Solve for x
x = 58,356,313,161.29/278,930.11 - Step 6: Final answer
x = 209,214.82
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1.5x scale
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.