Finding the Fourth Proportional to 455.21, 628.21 and 258.74
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Solution
The fourth proportional to 455.21, 628.21 and 258.74 is: 357.07
Step by Step Solution
- Step 1: Write the proportion equation
455.21 : 628.21 = 258.74 : x - Step 2: Convert to fraction form
455.21/628.21 = 258.74/x - Step 3: Cross multiply
455.21x = 628.21 × 258.74 - Step 4: Simplify right side
455.21x = 162,543.06 - Step 5: Solve for x
x = 162,543.06/455.21 - Step 6: Final answer
x = 357.07
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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.