Finding the Fourth Proportional to 716,978.24, 989,418.48 and 394,689.36
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Solution
The fourth proportional to 716,978.24, 989,418.48 and 394,689.36 is: 544,664.99
Step by Step Solution
- Step 1: Write the proportion equation
716,978.24 : 989,418.48 = 394,689.36 : x - Step 2: Convert to fraction form
716,978.24/989,418.48 = 394,689.36/x - Step 3: Cross multiply
716,978.24x = 989,418.48 × 394,689.36 - Step 4: Simplify right side
716,978.24x = 390,512,946,643.37 - Step 5: Solve for x
x = 390,512,946,643.37/716,978.24 - Step 6: Final answer
x = 544,664.99
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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.