Finding the Fourth Proportional to 390.35, 538.63 and 232.99
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Solution
The fourth proportional to 390.35, 538.63 and 232.99 is: 321.50
Step by Step Solution
- Step 1: Write the proportion equation
390.35 : 538.63 = 232.99 : x - Step 2: Convert to fraction form
390.35/538.63 = 232.99/x - Step 3: Cross multiply
390.35x = 538.63 × 232.99 - Step 4: Simplify right side
390.35x = 125,494.79 - Step 5: Solve for x
x = 125,494.79/390.35 - Step 6: Final answer
x = 321.50
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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.