Finding the Fourth Proportional to 79.58, 109.80 and 46.38
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Solution
The fourth proportional to 79.58, 109.80 and 46.38 is: 63.99
Step by Step Solution
- Step 1: Write the proportion equation
79.58 : 109.80 = 46.38 : x - Step 2: Convert to fraction form
79.58/109.80 = 46.38/x - Step 3: Cross multiply
79.58x = 109.80 × 46.38 - Step 4: Simplify right side
79.58x = 5,092.52 - Step 5: Solve for x
x = 5,092.52/79.58 - Step 6: Final answer
x = 63.99
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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.