Finding the Fourth Proportional to 257,462.65, 386,218.91 and 79,921.99
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Solution
The fourth proportional to 257,462.65, 386,218.91 and 79,921.99 is: 119,890.73
Step by Step Solution
- Step 1: Write the proportion equation
257,462.65 : 386,218.91 = 79,921.99 : x - Step 2: Convert to fraction form
257,462.65/386,218.91 = 79,921.99/x - Step 3: Cross multiply
257,462.65x = 386,218.91 × 79,921.99 - Step 4: Simplify right side
257,462.65x = 30,867,383,862.83 - Step 5: Solve for x
x = 30,867,383,862.83/257,462.65 - Step 6: Final answer
x = 119,890.73
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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.