Finding the Fourth Proportional to 278,455.09, 384,268.40 and 151,130.70
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Solution
The fourth proportional to 278,455.09, 384,268.40 and 151,130.70 is: 208,560.57
Step by Step Solution
- Step 1: Write the proportion equation
278,455.09 : 384,268.40 = 151,130.70 : x - Step 2: Convert to fraction form
278,455.09/384,268.40 = 151,130.70/x - Step 3: Cross multiply
278,455.09x = 384,268.40 × 151,130.70 - Step 4: Simplify right side
278,455.09x = 58,074,751,524.23 - Step 5: Solve for x
x = 58,074,751,524.23/278,455.09 - Step 6: Final answer
x = 208,560.57
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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.