Finding the Fourth Proportional to 291.99, 438.45 and 129.99
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Solution
The fourth proportional to 291.99, 438.45 and 129.99 is: 195.19
Step by Step Solution
- Step 1: Write the proportion equation
291.99 : 438.45 = 129.99 : x - Step 2: Convert to fraction form
291.99/438.45 = 129.99/x - Step 3: Cross multiply
291.99x = 438.45 × 129.99 - Step 4: Simplify right side
291.99x = 56,994.12 - Step 5: Solve for x
x = 56,994.12/291.99 - Step 6: Final answer
x = 195.19
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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.