Finding the Fourth Proportional to 389,803.55, 538,445.15 and 313,609.68
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Solution
The fourth proportional to 389,803.55, 538,445.15 and 313,609.68 is: 433,196.70
Step by Step Solution
- Step 1: Write the proportion equation
389,803.55 : 538,445.15 = 313,609.68 : x - Step 2: Convert to fraction form
389,803.55/538,445.15 = 313,609.68/x - Step 3: Cross multiply
389,803.55x = 538,445.15 × 313,609.68 - Step 4: Simplify right side
389,803.55x = 168,861,611,189.05 - Step 5: Solve for x
x = 168,861,611,189.05/389,803.55 - Step 6: Final answer
x = 433,196.70
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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.