Finding the Fourth Proportional to 753.74, 1,040.08 and 438.99
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Solution
The fourth proportional to 753.74, 1,040.08 and 438.99 is: 605.76
Step by Step Solution
- Step 1: Write the proportion equation
753.74 : 1,040.08 = 438.99 : x - Step 2: Convert to fraction form
753.74/1,040.08 = 438.99/x - Step 3: Cross multiply
753.74x = 1,040.08 × 438.99 - Step 4: Simplify right side
753.74x = 456,584.72 - Step 5: Solve for x
x = 456,584.72/753.74 - Step 6: Final answer
x = 605.76
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.