Finding the Fourth Proportional to 318,268.12, 438,757.70 and 253,166.44
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Solution
The fourth proportional to 318,268.12, 438,757.70 and 253,166.44 is: 349,009.90
Step by Step Solution
- Step 1: Write the proportion equation
318,268.12 : 438,757.70 = 253,166.44 : x - Step 2: Convert to fraction form
318,268.12/438,757.70 = 253,166.44/x - Step 3: Cross multiply
318,268.12x = 438,757.70 × 253,166.44 - Step 4: Simplify right side
318,268.12x = 111,078,724,931.59 - Step 5: Solve for x
x = 111,078,724,931.59/318,268.12 - Step 6: Final answer
x = 349,009.90
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1.5x scale
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.