Finding the Fourth Proportional to 680,906.80, 939,621.03 and 390,309.99
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Solution
The fourth proportional to 680,906.80, 939,621.03 and 390,309.99 is: 538,610.38
Step by Step Solution
- Step 1: Write the proportion equation
680,906.80 : 939,621.03 = 390,309.99 : x - Step 2: Convert to fraction form
680,906.80/939,621.03 = 390,309.99/x - Step 3: Cross multiply
680,906.80x = 939,621.03 × 390,309.99 - Step 4: Simplify right side
680,906.80x = 366,743,469,835.85 - Step 5: Solve for x
x = 366,743,469,835.85/680,906.80 - Step 6: Final answer
x = 538,610.38
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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.