Finding the Fourth Proportional to 415.14, 618.99 and 399.09
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Solution
The fourth proportional to 415.14, 618.99 and 399.09 is: 595.06
Step by Step Solution
- Step 1: Write the proportion equation
415.14 : 618.99 = 399.09 : x - Step 2: Convert to fraction form
415.14/618.99 = 399.09/x - Step 3: Cross multiply
415.14x = 618.99 × 399.09 - Step 4: Simplify right side
415.14x = 247,035.79 - Step 5: Solve for x
x = 247,035.79/415.14 - Step 6: Final answer
x = 595.06
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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.