Finding the Fourth Proportional to 429.71, 646.99 and 378.68
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Solution
The fourth proportional to 429.71, 646.99 and 378.68 is: 570.15
Step by Step Solution
- Step 1: Write the proportion equation
429.71 : 646.99 = 378.68 : x - Step 2: Convert to fraction form
429.71/646.99 = 378.68/x - Step 3: Cross multiply
429.71x = 646.99 × 378.68 - Step 4: Simplify right side
429.71x = 244,997.99 - Step 5: Solve for x
x = 244,997.99/429.71 - Step 6: Final answer
x = 570.15
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These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.