Finding the Fourth Proportional to 389.05, 537.65 and 318.99
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Solution
The fourth proportional to 389.05, 537.65 and 318.99 is: 440.84
Step by Step Solution
- Step 1: Write the proportion equation
389.05 : 537.65 = 318.99 : x - Step 2: Convert to fraction form
389.05/537.65 = 318.99/x - Step 3: Cross multiply
389.05x = 537.65 × 318.99 - Step 4: Simplify right side
389.05x = 171,505.77 - Step 5: Solve for x
x = 171,505.77/389.05 - Step 6: Final answer
x = 440.84
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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.