Finding the Fourth Proportional to 207.74, 312.02 and 139.70
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Solution
The fourth proportional to 207.74, 312.02 and 139.70 is: 209.83
Step by Step Solution
- Step 1: Write the proportion equation
207.74 : 312.02 = 139.70 : x - Step 2: Convert to fraction form
207.74/312.02 = 139.70/x - Step 3: Cross multiply
207.74x = 312.02 × 139.70 - Step 4: Simplify right side
207.74x = 43,589.19 - Step 5: Solve for x
x = 43,589.19/207.74 - Step 6: Final answer
x = 209.83
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.