Finding the Fourth Proportional to 347.18, 478.99 and 207.20
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Solution
The fourth proportional to 347.18, 478.99 and 207.20 is: 285.86
Step by Step Solution
- Step 1: Write the proportion equation
347.18 : 478.99 = 207.20 : x - Step 2: Convert to fraction form
347.18/478.99 = 207.20/x - Step 3: Cross multiply
347.18x = 478.99 × 207.20 - Step 4: Simplify right side
347.18x = 99,245.69 - Step 5: Solve for x
x = 99,245.69/347.18 - Step 6: Final answer
x = 285.86
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.