Finding the Fourth Proportional to 432.36, 648.54 and 261
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Solution
The fourth proportional to 432.36, 648.54 and 261 is: 391.50
Step by Step Solution
- Step 1: Write the proportion equation
432.36 : 648.54 = 261 : x - Step 2: Convert to fraction form
432.36/648.54 = 261/x - Step 3: Cross multiply
432.36x = 648.54 × 261 - Step 4: Simplify right side
432.36x = 169,268.94 - Step 5: Solve for x
x = 169,268.94/432.36 - Step 6: Final answer
x = 391.50
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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.