Finding the Fourth Proportional to 61.40, 84.71 and 42.99
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Solution
The fourth proportional to 61.40, 84.71 and 42.99 is: 59.31
Step by Step Solution
- Step 1: Write the proportion equation
61.40 : 84.71 = 42.99 : x - Step 2: Convert to fraction form
61.40/84.71 = 42.99/x - Step 3: Cross multiply
61.40x = 84.71 × 42.99 - Step 4: Simplify right side
61.40x = 3,641.47 - Step 5: Solve for x
x = 3,641.47/61.40 - Step 6: Final answer
x = 59.31
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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.