Finding the Fourth Proportional to 390.76, 539.27 and 224.99
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Solution
The fourth proportional to 390.76, 539.27 and 224.99 is: 310.50
Step by Step Solution
- Step 1: Write the proportion equation
390.76 : 539.27 = 224.99 : x - Step 2: Convert to fraction form
390.76/539.27 = 224.99/x - Step 3: Cross multiply
390.76x = 539.27 × 224.99 - Step 4: Simplify right side
390.76x = 121,330.36 - Step 5: Solve for x
x = 121,330.36/390.76 - Step 6: Final answer
x = 310.50
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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.