Finding the Fourth Proportional to 278,723.21, 384,645.19 and 151,406.09
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Solution
The fourth proportional to 278,723.21, 384,645.19 and 151,406.09 is: 208,944.29
Step by Step Solution
- Step 1: Write the proportion equation
278,723.21 : 384,645.19 = 151,406.09 : x - Step 2: Convert to fraction form
278,723.21/384,645.19 = 151,406.09/x - Step 3: Cross multiply
278,723.21x = 384,645.19 × 151,406.09 - Step 4: Simplify right side
278,723.21x = 58,237,623,498.18 - Step 5: Solve for x
x = 58,237,623,498.18/278,723.21 - Step 6: Final answer
x = 208,944.29
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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.