Finding the Fourth Proportional to 319.23, 478.62 and 136.53
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Solution
The fourth proportional to 319.23, 478.62 and 136.53 is: 204.70
Step by Step Solution
- Step 1: Write the proportion equation
319.23 : 478.62 = 136.53 : x - Step 2: Convert to fraction form
319.23/478.62 = 136.53/x - Step 3: Cross multiply
319.23x = 478.62 × 136.53 - Step 4: Simplify right side
319.23x = 65,345.99 - Step 5: Solve for x
x = 65,345.99/319.23 - Step 6: Final answer
x = 204.70
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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.