Finding the Fourth Proportional to 689.36, 1,033.68 and 518
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Solution
The fourth proportional to 689.36, 1,033.68 and 518 is: 776.73
Step by Step Solution
- Step 1: Write the proportion equation
689.36 : 1,033.68 = 518 : x - Step 2: Convert to fraction form
689.36/1,033.68 = 518/x - Step 3: Cross multiply
689.36x = 1,033.68 × 518 - Step 4: Simplify right side
689.36x = 535,446.24 - Step 5: Solve for x
x = 535,446.24/689.36 - Step 6: Final answer
x = 776.73
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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.