Finding the Fourth Proportional to 811.63, 1,119.99 and 550
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Solution
The fourth proportional to 811.63, 1,119.99 and 550 is: 758.96
Step by Step Solution
- Step 1: Write the proportion equation
811.63 : 1,119.99 = 550 : x - Step 2: Convert to fraction form
811.63/1,119.99 = 550/x - Step 3: Cross multiply
811.63x = 1,119.99 × 550 - Step 4: Simplify right side
811.63x = 615,994.50 - Step 5: Solve for x
x = 615,994.50/811.63 - Step 6: Final answer
x = 758.96
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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.