Finding the Fourth Proportional to 42.99, 64.45 and 15.91
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Solution
The fourth proportional to 42.99, 64.45 and 15.91 is: 23.85
Step by Step Solution
- Step 1: Write the proportion equation
42.99 : 64.45 = 15.91 : x - Step 2: Convert to fraction form
42.99/64.45 = 15.91/x - Step 3: Cross multiply
42.99x = 64.45 × 15.91 - Step 4: Simplify right side
42.99x = 1,025.40 - Step 5: Solve for x
x = 1,025.40/42.99 - Step 6: Final answer
x = 23.85
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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.