Finding the Fourth Proportional to 172.40, 258.55 and 48.99
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Solution
The fourth proportional to 172.40, 258.55 and 48.99 is: 73.48
Step by Step Solution
- Step 1: Write the proportion equation
172.40 : 258.55 = 48.99 : x - Step 2: Convert to fraction form
172.40/258.55 = 48.99/x - Step 3: Cross multiply
172.40x = 258.55 × 48.99 - Step 4: Simplify right side
172.40x = 12,667.40 - Step 5: Solve for x
x = 12,667.40/172.40 - Step 6: Final answer
x = 73.48
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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.