Finding the Fourth Proportional to 207.13, 310.70 and 68.30
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Solution
The fourth proportional to 207.13, 310.70 and 68.30 is: 102.45
Step by Step Solution
- Step 1: Write the proportion equation
207.13 : 310.70 = 68.30 : x - Step 2: Convert to fraction form
207.13/310.70 = 68.30/x - Step 3: Cross multiply
207.13x = 310.70 × 68.30 - Step 4: Simplify right side
207.13x = 21,220.47 - Step 5: Solve for x
x = 21,220.47/207.13 - Step 6: Final answer
x = 102.45
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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.