Finding the Fourth Proportional to 573.19, 790.99 and 311.20
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Solution
The fourth proportional to 573.19, 790.99 and 311.20 is: 429.45
Step by Step Solution
- Step 1: Write the proportion equation
573.19 : 790.99 = 311.20 : x - Step 2: Convert to fraction form
573.19/790.99 = 311.20/x - Step 3: Cross multiply
573.19x = 790.99 × 311.20 - Step 4: Simplify right side
573.19x = 246,156.09 - Step 5: Solve for x
x = 246,156.09/573.19 - Step 6: Final answer
x = 429.45
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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.