Finding the Fourth Proportional to 639.68, 882.99 and 418.68
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Solution
The fourth proportional to 639.68, 882.99 and 418.68 is: 577.93
Step by Step Solution
- Step 1: Write the proportion equation
639.68 : 882.99 = 418.68 : x - Step 2: Convert to fraction form
639.68/882.99 = 418.68/x - Step 3: Cross multiply
639.68x = 882.99 × 418.68 - Step 4: Simplify right side
639.68x = 369,690.25 - Step 5: Solve for x
x = 369,690.25/639.68 - Step 6: Final answer
x = 577.93
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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.