Finding the Fourth Proportional to 431.14, 645.95 and 353.99
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Solution
The fourth proportional to 431.14, 645.95 and 353.99 is: 530.36
Step by Step Solution
- Step 1: Write the proportion equation
431.14 : 645.95 = 353.99 : x - Step 2: Convert to fraction form
431.14/645.95 = 353.99/x - Step 3: Cross multiply
431.14x = 645.95 × 353.99 - Step 4: Simplify right side
431.14x = 228,659.84 - Step 5: Solve for x
x = 228,659.84/431.14 - Step 6: Final answer
x = 530.36
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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.