Finding the Fourth Proportional to 455.61, 628.55 and 330.99
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Solution
The fourth proportional to 455.61, 628.55 and 330.99 is: 456.62
Step by Step Solution
- Step 1: Write the proportion equation
455.61 : 628.55 = 330.99 : x - Step 2: Convert to fraction form
455.61/628.55 = 330.99/x - Step 3: Cross multiply
455.61x = 628.55 × 330.99 - Step 4: Simplify right side
455.61x = 208,042.11 - Step 5: Solve for x
x = 208,042.11/455.61 - Step 6: Final answer
x = 456.62
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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.