Finding the Fourth Proportional to 855.84, 1,284 and 471.36
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Solution
The fourth proportional to 855.84, 1,284 and 471.36 is: 707.17
Step by Step Solution
- Step 1: Write the proportion equation
855.84 : 1,284 = 471.36 : x - Step 2: Convert to fraction form
855.84/1,284 = 471.36/x - Step 3: Cross multiply
855.84x = 1,284 × 471.36 - Step 4: Simplify right side
855.84x = 605,226.24 - Step 5: Solve for x
x = 605,226.24/855.84 - Step 6: Final answer
x = 707.17
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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.