Finding the Fourth Proportional to 457.18, 686.99 and 455.97
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Solution
The fourth proportional to 457.18, 686.99 and 455.97 is: 685.17
Step by Step Solution
- Step 1: Write the proportion equation
457.18 : 686.99 = 455.97 : x - Step 2: Convert to fraction form
457.18/686.99 = 455.97/x - Step 3: Cross multiply
457.18x = 686.99 × 455.97 - Step 4: Simplify right side
457.18x = 313,246.83 - Step 5: Solve for x
x = 313,246.83/457.18 - Step 6: Final answer
x = 685.17
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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.