Finding the Fourth Proportional to 315.80, 473.68 and 84.68
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Solution
The fourth proportional to 315.80, 473.68 and 84.68 is: 127.02
Step by Step Solution
- Step 1: Write the proportion equation
315.80 : 473.68 = 84.68 : x - Step 2: Convert to fraction form
315.80/473.68 = 84.68/x - Step 3: Cross multiply
315.80x = 473.68 × 84.68 - Step 4: Simplify right side
315.80x = 40,113.40 - Step 5: Solve for x
x = 40,113.40/315.80 - Step 6: Final answer
x = 127.02
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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.