Finding the Fourth Proportional to 717.62, 990.08 and 437.75
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Solution
The fourth proportional to 717.62, 990.08 and 437.75 is: 603.96
Step by Step Solution
- Step 1: Write the proportion equation
717.62 : 990.08 = 437.75 : x - Step 2: Convert to fraction form
717.62/990.08 = 437.75/x - Step 3: Cross multiply
717.62x = 990.08 × 437.75 - Step 4: Simplify right side
717.62x = 433,412.13 - Step 5: Solve for x
x = 433,412.13/717.62 - Step 6: Final answer
x = 603.96
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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.