Finding the Fourth Proportional to 716,320.78, 988,517.14 and 394,023.80
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Solution
The fourth proportional to 716,320.78, 988,517.14 and 394,023.80 is: 543,749.80
Step by Step Solution
- Step 1: Write the proportion equation
716,320.78 : 988,517.14 = 394,023.80 : x - Step 2: Convert to fraction form
716,320.78/988,517.14 = 394,023.80/x - Step 3: Cross multiply
716,320.78x = 988,517.14 × 394,023.80 - Step 4: Simplify right side
716,320.78x = 389,499,279,867.93 - Step 5: Solve for x
x = 389,499,279,867.93/716,320.78 - Step 6: Final answer
x = 543,749.80
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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.