Finding the Fourth Proportional to 45.98, 68.57 and 42.05
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Solution
The fourth proportional to 45.98, 68.57 and 42.05 is: 62.71
Step by Step Solution
- Step 1: Write the proportion equation
45.98 : 68.57 = 42.05 : x - Step 2: Convert to fraction form
45.98/68.57 = 42.05/x - Step 3: Cross multiply
45.98x = 68.57 × 42.05 - Step 4: Simplify right side
45.98x = 2,883.13 - Step 5: Solve for x
x = 2,883.13/45.98 - Step 6: Final answer
x = 62.71
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.