Finding the Fourth Proportional to 1,639.87, 2,460 and 666.25
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Solution
The fourth proportional to 1,639.87, 2,460 and 666.25 is: 999.45
Step by Step Solution
- Step 1: Write the proportion equation
1,639.87 : 2,460 = 666.25 : x - Step 2: Convert to fraction form
1,639.87/2,460 = 666.25/x - Step 3: Cross multiply
1,639.87x = 2,460 × 666.25 - Step 4: Simplify right side
1,639.87x = 1,638,975 - Step 5: Solve for x
x = 1,638,975/1,639.87 - Step 6: Final answer
x = 999.45
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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.