Finding the Fourth Proportional to 900.50, 1,242.69 and 486.50
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Solution
The fourth proportional to 900.50, 1,242.69 and 486.50 is: 671.37
Step by Step Solution
- Step 1: Write the proportion equation
900.50 : 1,242.69 = 486.50 : x - Step 2: Convert to fraction form
900.50/1,242.69 = 486.50/x - Step 3: Cross multiply
900.50x = 1,242.69 × 486.50 - Step 4: Simplify right side
900.50x = 604,568.69 - Step 5: Solve for x
x = 604,568.69/900.50 - Step 6: Final answer
x = 671.37
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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.