Finding the Fourth Proportional to 389.13, 536.99 and 212.09
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Solution
The fourth proportional to 389.13, 536.99 and 212.09 is: 292.67
Step by Step Solution
- Step 1: Write the proportion equation
389.13 : 536.99 = 212.09 : x - Step 2: Convert to fraction form
389.13/536.99 = 212.09/x - Step 3: Cross multiply
389.13x = 536.99 × 212.09 - Step 4: Simplify right side
389.13x = 113,886.99 - Step 5: Solve for x
x = 113,886.99/389.13 - Step 6: Final answer
x = 292.67
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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.