Finding the Fourth Proportional to 415,419.40, 623,129.10 and 257,825.80
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Solution
The fourth proportional to 415,419.40, 623,129.10 and 257,825.80 is: 386,738.70
Step by Step Solution
- Step 1: Write the proportion equation
415,419.40 : 623,129.10 = 257,825.80 : x - Step 2: Convert to fraction form
415,419.40/623,129.10 = 257,825.80/x - Step 3: Cross multiply
415,419.40x = 623,129.10 × 257,825.80 - Step 4: Simplify right side
415,419.40x = 160,658,758,710.78 - Step 5: Solve for x
x = 160,658,758,710.78/415,419.40 - Step 6: Final answer
x = 386,738.70
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1.5x scale
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.