Finding the Fourth Proportional to 42.86, 64.17 and 30.05
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Solution
The fourth proportional to 42.86, 64.17 and 30.05 is: 44.99
Step by Step Solution
- Step 1: Write the proportion equation
42.86 : 64.17 = 30.05 : x - Step 2: Convert to fraction form
42.86/64.17 = 30.05/x - Step 3: Cross multiply
42.86x = 64.17 × 30.05 - Step 4: Simplify right side
42.86x = 1,927.99 - Step 5: Solve for x
x = 1,927.99/42.86 - Step 6: Final answer
x = 44.99
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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.