Finding the Fourth Proportional to 421.63, 628.99 and 392.17
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Solution
The fourth proportional to 421.63, 628.99 and 392.17 is: 585.04
Step by Step Solution
- Step 1: Write the proportion equation
421.63 : 628.99 = 392.17 : x - Step 2: Convert to fraction form
421.63/628.99 = 392.17/x - Step 3: Cross multiply
421.63x = 628.99 × 392.17 - Step 4: Simplify right side
421.63x = 246,671.01 - Step 5: Solve for x
x = 246,671.01/421.63 - Step 6: Final answer
x = 585.04
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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.