Finding the Fourth Proportional to 455.24, 628.02 and 390.44
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Solution
The fourth proportional to 455.24, 628.02 and 390.44 is: 538.63
Step by Step Solution
- Step 1: Write the proportion equation
455.24 : 628.02 = 390.44 : x - Step 2: Convert to fraction form
455.24/628.02 = 390.44/x - Step 3: Cross multiply
455.24x = 628.02 × 390.44 - Step 4: Simplify right side
455.24x = 245,204.13 - Step 5: Solve for x
x = 245,204.13/455.24 - Step 6: Final answer
x = 538.63
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.