Finding the Fourth Proportional to 497.86, 686.99 and 287.99
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Solution
The fourth proportional to 497.86, 686.99 and 287.99 is: 397.39
Step by Step Solution
- Step 1: Write the proportion equation
497.86 : 686.99 = 287.99 : x - Step 2: Convert to fraction form
497.86/686.99 = 287.99/x - Step 3: Cross multiply
497.86x = 686.99 × 287.99 - Step 4: Simplify right side
497.86x = 197,846.25 - Step 5: Solve for x
x = 197,846.25/497.86 - Step 6: Final answer
x = 397.39
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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.