Finding the Fourth Proportional to 258,889.24, 387,502.80 and 138,779.20
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Solution
The fourth proportional to 258,889.24, 387,502.80 and 138,779.20 is: 207,723.31
Step by Step Solution
- Step 1: Write the proportion equation
258,889.24 : 387,502.80 = 138,779.20 : x - Step 2: Convert to fraction form
258,889.24/387,502.80 = 138,779.20/x - Step 3: Cross multiply
258,889.24x = 387,502.80 × 138,779.20 - Step 4: Simplify right side
258,889.24x = 53,777,328,581.76 - Step 5: Solve for x
x = 53,777,328,581.76/258,889.24 - Step 6: Final answer
x = 207,723.31
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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.