Finding the Fourth Proportional to 518.70, 777.63 and 210.70
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Solution
The fourth proportional to 518.70, 777.63 and 210.70 is: 315.88
Step by Step Solution
- Step 1: Write the proportion equation
518.70 : 777.63 = 210.70 : x - Step 2: Convert to fraction form
518.70/777.63 = 210.70/x - Step 3: Cross multiply
518.70x = 777.63 × 210.70 - Step 4: Simplify right side
518.70x = 163,848.40 - Step 5: Solve for x
x = 163,848.40/518.70 - Step 6: Final answer
x = 315.88
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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.