Finding the Fourth Proportional to 418.40, 627.58 and 129.84
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Solution
The fourth proportional to 418.40, 627.58 and 129.84 is: 194.75
Step by Step Solution
- Step 1: Write the proportion equation
418.40 : 627.58 = 129.84 : x - Step 2: Convert to fraction form
418.40/627.58 = 129.84/x - Step 3: Cross multiply
418.40x = 627.58 × 129.84 - Step 4: Simplify right side
418.40x = 81,484.99 - Step 5: Solve for x
x = 81,484.99/418.40 - Step 6: Final answer
x = 194.75
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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.