Finding the Fourth Proportional to 660.21, 990 and 294.99
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Solution
The fourth proportional to 660.21, 990 and 294.99 is: 442.34
Step by Step Solution
- Step 1: Write the proportion equation
660.21 : 990 = 294.99 : x - Step 2: Convert to fraction form
660.21/990 = 294.99/x - Step 3: Cross multiply
660.21x = 990 × 294.99 - Step 4: Simplify right side
660.21x = 292,040.10 - Step 5: Solve for x
x = 292,040.10/660.21 - Step 6: Final answer
x = 442.34
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.