Finding the Fourth Proportional to 279,213.12, 385,456.80 and 215,407.68
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Solution
The fourth proportional to 279,213.12, 385,456.80 and 215,407.68 is: 297,372.68
Step by Step Solution
- Step 1: Write the proportion equation
279,213.12 : 385,456.80 = 215,407.68 : x - Step 2: Convert to fraction form
279,213.12/385,456.80 = 215,407.68/x - Step 3: Cross multiply
279,213.12x = 385,456.80 × 215,407.68 - Step 4: Simplify right side
279,213.12x = 83,030,355,028.22 - Step 5: Solve for x
x = 83,030,355,028.22/279,213.12 - Step 6: Final answer
x = 297,372.68
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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.