Finding the Fourth Proportional to 751.44, 1,128 and 547.28
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Solution
The fourth proportional to 751.44, 1,128 and 547.28 is: 821.53
Step by Step Solution
- Step 1: Write the proportion equation
751.44 : 1,128 = 547.28 : x - Step 2: Convert to fraction form
751.44/1,128 = 547.28/x - Step 3: Cross multiply
751.44x = 1,128 × 547.28 - Step 4: Simplify right side
751.44x = 617,331.84 - Step 5: Solve for x
x = 617,331.84/751.44 - Step 6: Final answer
x = 821.53
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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.