Finding the Fourth Proportional to 390.55, 586.13 and 344.99
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Solution
The fourth proportional to 390.55, 586.13 and 344.99 is: 517.75
Step by Step Solution
- Step 1: Write the proportion equation
390.55 : 586.13 = 344.99 : x - Step 2: Convert to fraction form
390.55/586.13 = 344.99/x - Step 3: Cross multiply
390.55x = 586.13 × 344.99 - Step 4: Simplify right side
390.55x = 202,208.99 - Step 5: Solve for x
x = 202,208.99/390.55 - Step 6: Final answer
x = 517.75
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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.